As per IPMB specification, maximum packet size supported is 255,
modified Max length to 240 from 128 to accommodate more data.
Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Message-Id: <20191211190155.1279610-1-vijaykhemka@fb.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Many IPMB devices don't support smbus protocol and this driver
only supports the smbus protocol at the moment.
Added support for the i2c protocol as well. There will be a variable
"i2c-protocol" passed by the device tree or ACPI table which determines
whether the protocol is i2c or smbus.
Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Reviewed-by: Asmaa Mnebhi <asmaa@mellanox.com>
Message-Id: <20191211185604.1266063-1-vijaykhemka@fb.com>
[IPMB.txt had moved to driver-api/ipmb.rst, I adjusted]
Signed-off-by: Corey Minyard <cminyard@mvista.com>
As part of the cleanup of some remaining y2038 issues, I came to
fs/compat_ioctl.c, which still has a couple of commands that need support
for time64_t.
In completely unrelated work, I spent time on cleaning up parts of this
file in the past, moving things out into drivers instead.
After Al Viro reviewed an earlier version of this series and did a lot
more of that cleanup, I decided to try to completely eliminate the rest
of it and move it all into drivers.
This series incorporates some of Al's work and many patches of my own,
but in the end stops short of actually removing the last part, which is
the scsi ioctl handlers. I have patches for those as well, but they need
more testing or possibly a rewrite.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'compat-ioctl-5.5' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground
Pull removal of most of fs/compat_ioctl.c from Arnd Bergmann:
"As part of the cleanup of some remaining y2038 issues, I came to
fs/compat_ioctl.c, which still has a couple of commands that need
support for time64_t.
In completely unrelated work, I spent time on cleaning up parts of
this file in the past, moving things out into drivers instead.
After Al Viro reviewed an earlier version of this series and did a lot
more of that cleanup, I decided to try to completely eliminate the
rest of it and move it all into drivers.
This series incorporates some of Al's work and many patches of my own,
but in the end stops short of actually removing the last part, which
is the scsi ioctl handlers. I have patches for those as well, but they
need more testing or possibly a rewrite"
* tag 'compat-ioctl-5.5' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground: (42 commits)
scsi: sd: enable compat ioctls for sed-opal
pktcdvd: add compat_ioctl handler
compat_ioctl: move SG_GET_REQUEST_TABLE handling
compat_ioctl: ppp: move simple commands into ppp_generic.c
compat_ioctl: handle PPPIOCGIDLE for 64-bit time_t
compat_ioctl: move PPPIOCSCOMPRESS to ppp_generic
compat_ioctl: unify copy-in of ppp filters
tty: handle compat PPP ioctls
compat_ioctl: move SIOCOUTQ out of compat_ioctl.c
compat_ioctl: handle SIOCOUTQNSD
af_unix: add compat_ioctl support
compat_ioctl: reimplement SG_IO handling
compat_ioctl: move WDIOC handling into wdt drivers
fs: compat_ioctl: move FITRIM emulation into file systems
gfs2: add compat_ioctl support
compat_ioctl: remove unused convert_in_user macro
compat_ioctl: remove last RAID handling code
compat_ioctl: remove /dev/raw ioctl translation
compat_ioctl: remove PCI ioctl translation
compat_ioctl: remove joystick ioctl translation
...
Here is the big set of char/misc and other driver patches for 5.5-rc1
Loads of different things in here, this feels like the catch-all of
driver subsystems these days. Full details are in the shortlog, but
nothing major overall, just lots of driver updates and additions.
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here is the big set of char/misc and other driver patches for 5.5-rc1
Loads of different things in here, this feels like the catch-all of
driver subsystems these days. Full details are in the shortlog, but
nothing major overall, just lots of driver updates and additions.
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (198 commits)
char: Fix Kconfig indentation, continued
habanalabs: add more protection of device during reset
habanalabs: flush EQ workers in hard reset
habanalabs: make the reset code more consistent
habanalabs: expose reset counters via existing INFO IOCTL
habanalabs: make code more concise
habanalabs: use defines for F/W files
habanalabs: remove prints on successful device initialization
habanalabs: remove unnecessary checks
habanalabs: invalidate MMU cache only once
habanalabs: skip VA block list update in reset flow
habanalabs: optimize MMU unmap
habanalabs: prevent read/write from/to the device during hard reset
habanalabs: split MMU properties to PCI/DRAM
habanalabs: re-factor MMU masks and documentation
habanalabs: type specific MMU cache invalidation
habanalabs: re-factor memory module code
habanalabs: export uapi defines to user-space
habanalabs: don't print error when queues are full
habanalabs: increase max jobs number to 512
...
ipmb_poll() is defined as returning 'unsigned int' but the
.poll method is declared as returning '__poll_t', a bitwise type.
Fix this by using the proper return type and using the EPOLL
constants instead of the POLL ones, as required for __poll_t.
CC: Corey Minyard <minyard@acm.org>
CC: openipmi-developer@lists.sourceforge.net
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Message-Id: <20191120000741.30657-1-luc.vanoostenryck@gmail.com>
Reviewed-by: Asmaa Mnebhi <asmaa@mellanox.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Adjust indentation from seven spaces to tab (+optional two spaces) as in
coding style with command like:
$ sed -e 's/^ /\t/' -i */Kconfig
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20191121132842.28942-1-krzk@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
$ sed -e 's/^ /\t/' -i */Kconfig
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20191120134247.16073-1-krzk@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
'struct timespec' is getting removed from the kernel. The usage in ipmi
was fixed before in commit 48862ea2ce ("ipmi: Update timespec usage
to timespec64"), but unfortunately it crept back in.
The busy looping code can better use ktime_t anyway, so use that
there to simplify the implementation.
Fixes: cbb19cb1ee ("ipmi_si: Convert timespec64 to timespec")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Message-Id: <20191108203435.112759-5-arnd@arndb.de>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Removed check for request or response in IPMB packets coming from
device as well as from host. Now it supports both way communication
to device via IPMB. Both request and response will be passed to
application.
Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Message-Id: <20191106182921.1086795-1-vijaykhemka@fb.com>
Reviewed-by: Asmaa Mnebhi <Asmaa@mellanox.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
All watchdog drivers implement the same set of ioctl commands, and
fortunately all of them are compatible between 32-bit and 64-bit
architectures.
Modern drivers always go through drivers/watchdog/wdt.c as an abstraction
layer, but older ones implement their own file_operations on a character
device for this.
Move the handling from fs/compat_ioctl.c into the individual drivers.
Note that most of the legacy drivers will never be used on 64-bit
hardware, because they are for an old 32-bit SoC implementation, but
doing them all at once is safer than trying to guess which ones do
or do not need the compat_ioctl handling.
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
In the impelementation of __ipmi_bmc_register() the allocated memory for
bmc should be released in case ida_simple_get() fails.
Fixes: 68e7e50f19 ("ipmi: Don't use BMC product/dev ids in the BMC name")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Message-Id: <20191021200649.1511-1-navid.emamdoost@gmail.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Message-Id: <20191016092131.23096-1-yuehaibing@huawei.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Use %*ph format to print small buffer as hex string.
The change is safe since the specifier can handle up to 64 bytes and taking
into account the buffer size of 100 bytes on stack the function has never been
used to dump more than 32 bytes. Note, this also avoids potential buffer
overflow if the length of the input buffer is bigger.
This completely eliminates ipmi_debug_msg() in favour of Dynamic Debug.
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Message-Id: <20191011155036.36748-1-andriy.shevchenko@linux.intel.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
If something has the IPMI driver open, don't allow the device
module to be unloaded. Before it would unload and the user would
get errors on use.
This change is made on user request, and it makes it consistent
with the I2C driver, which has the same behavior.
It does change things a little bit with respect to kernel users.
If the ACPI or IPMI watchdog (or any other kernel user) has
created a user, then the device module cannot be unloaded. Before
it could be unloaded,
This does not affect hot-plug. If the device goes away (it's on
something removable that is removed or is hot-removed via sysfs)
then it still behaves as it did before.
Reported-by: tony camuso <tcamuso@redhat.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: tony camuso <tcamuso@redhat.com>
smi_mod_timer() enables the timer before setting timer_running. This
means the timer can be running when we get to stop_timer_and_thread()
without timer_running having been set, resulting in del_timer_sync()
not being called and the timer being left to cause havoc during
shutdown.
Instead just call del_timer_sync() unconditionally
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
Message-Id: <20190828203625.32093-2-Jes.Sorensen@gmail.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
V1->V2: in handle_one_rcv_msg, if data_size > 2, set requeue to zero and
goto out instead of calling ipmi_free_msg.
Kosuke Tatsukawa <tatsu@ab.jp.nec.com>
In the source stack trace below, function set_need_watch tries to
take out the same si_lock that was taken earlier by ipmi_thread.
ipmi_thread() [drivers/char/ipmi/ipmi_si_intf.c:995]
smi_event_handler() [drivers/char/ipmi/ipmi_si_intf.c:765]
handle_transaction_done() [drivers/char/ipmi/ipmi_si_intf.c:555]
deliver_recv_msg() [drivers/char/ipmi/ipmi_si_intf.c:283]
ipmi_smi_msg_received() [drivers/char/ipmi/ipmi_msghandler.c:4503]
intf_err_seq() [drivers/char/ipmi/ipmi_msghandler.c:1149]
smi_remove_watch() [drivers/char/ipmi/ipmi_msghandler.c:999]
set_need_watch() [drivers/char/ipmi/ipmi_si_intf.c:1066]
Upstream commit e1891cffd4 adds code to
ipmi_smi_msg_received() to call smi_remove_watch() via intf_err_seq()
and this seems to be causing the deadlock.
commit e1891cffd4
Author: Corey Minyard <cminyard@mvista.com>
Date: Wed Oct 24 15:17:04 2018 -0500
ipmi: Make the smi watcher be disabled immediately when not needed
The fix is to put all messages in the queue and move the message
checking code out of ipmi_smi_msg_received and into handle_one_recv_msg,
which processes the message checking after ipmi_thread releases its
locks.
Additionally,Kosuke Tatsukawa <tatsu@ab.jp.nec.com> reported that
handle_new_recv_msgs calls ipmi_free_msg when handle_one_rcv_msg returns
zero, so that the call to ipmi_free_msg in handle_one_rcv_msg introduced
another panic when "ipmitool sensor list" was run in a loop. He
submitted this part of the patch.
+free_msg:
+ requeue = 0;
+ goto out;
Reported by: Osamu Samukawa <osa-samukawa@tg.jp.nec.com>
Characterized by: Kosuke Tatsukawa <tatsu@ab.jp.nec.com>
Signed-off-by: Tony Camuso <tcamuso@redhat.com>
Fixes: e1891cffd4 ("ipmi: Make the smi watcher be disabled immediately when not needed")
Cc: stable@vger.kernel.org # 5.1
Signed-off-by: Corey Minyard <cminyard@mvista.com>
It is possible that SSIF interface entry is present in both DMI and ACPI
tables. In SMP systems, in such cases it is possible that ssif_probe could
be called simultaneously from i2c interface (from ACPI) and from DMI on
different CPUs at kernel boot. Both try to register same SSIF interface
simultaneously and result in race.
In such cases where ACPI and SMBIOS both IPMI entries are available, we
need to prefer ACPI over SMBIOS so that ACPI functions work properly if
they use IPMI.
So, if we get an ACPI interface and have already registered an SMBIOS
at the same address, we need to remove the SMBIOS one and add the ACPI.
Log:
[ 38.774743] ipmi device interface
[ 38.805006] ipmi_ssif: IPMI SSIF Interface driver
[ 38.861979] ipmi_ssif i2c-IPI0001:06: ssif_probe CPU 99 ***
[ 38.863655] ipmi_ssif 0-000e: ssif_probe CPU 14 ***
[ 38.863658] ipmi_ssif: Trying SMBIOS-specified SSIF interface at i2c address 0xe, adapter xlp9xx-i2c, slave address 0x0
[ 38.869500] ipmi_ssif: Trying ACPI-specified SSIF interface at i2c address 0xe, adapter xlp9xx-i2c, slave address 0x0
[ 38.914530] ipmi_ssif: Unable to clear message flags: -22 7 c7
[ 38.952429] ipmi_ssif: Unable to clear message flags: -22 7 00
[ 38.994734] ipmi_ssif: Error getting global enables: -22 7 00
[ 39.015877] ipmi_ssif 0-000e: IPMI message handler: Found new BMC (man_id: 0x00b3d1, prod_id: 0x0001, dev_id: 0x20)
[ 39.377645] ipmi_ssif i2c-IPI0001:06: IPMI message handler: Found new BMC (man_id: 0x00b3d1, prod_id: 0x0001, dev_id: 0x20)
[ 39.387863] ipmi_ssif 0-000e: IPMI message handler: BMC returned incorrect response, expected netfn 7 cmd 42, got netfn 7 cmd 1
...
[NOTE] : Added custom prints to explain the problem.
In the above log, ssif_probe is executed simultaneously on two different
CPUs.
This patch fixes this issue in following way:
- Adds ACPI entry also to the 'ssif_infos' list.
- Checks the list if SMBIOS is already registered, removes it and adds
ACPI.
- If ACPI is already registered, it ignores SMBIOS.
- Adds mutex lock throughout the probe process to avoid race.
Signed-off-by: Kamlakant Patel <kamlakantp@marvell.com>
Message-Id: <1566389064-27356-1-git-send-email-kamlakantp@marvell.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
If the driver handles a response in an oops, it was just ignoring
the message. However, the IPMI watchdog timer was counting on the
free happening to know when panic-time messages were complete. So
free it in all cases.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
ipmi_thread() uses back-to-back schedule() to poll for command
completion which, on some machines, can push up CPU consumption and
heavily tax the scheduler locks leading to noticeable overall
performance degradation.
This was originally added so firmware updates through IPMI would
complete in a timely manner. But we can't kill the scheduler
locks for that one use case.
Instead, only run schedule() continuously in maintenance mode,
where firmware updates should run.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
ipmi_si_sm.h was getting included in lots of places it didn't
belong. Rework things a bit to remove all the dependencies,
mostly just moving things between include files that were in
the wrong place and removing bogus includes.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
There is no need for timespec64, and it will cause issues in the
future with i386 and 64-bit division not being available.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
ret at line 112 of ipmb_dev_int.c is uninitialized which
results in a warning during build regressions.
This warning was found by build regression/improvement
testing for v5.3-rc1.
Reported-by: build regression/improvement testing for v5.3-rc1.
Fixes: 51bd6f2915 ("Add support for IPMB driver")
Signed-off-by: Asmaa Mnebhi <Asmaa@mellanox.com>
Message-Id: <571dbb67cf58411d567953d9fb3739eb4789238b.1563996586.git.Asmaa@mellanox.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
by automated tools.
Plus add a driver that allows Linux to act as an IPMB slave device,
so it can be a satellite MC in an IPMI network.
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Merge tag 'for-linus-5.3' of git://github.com/cminyard/linux-ipmi
Pull IPMI updates from Corey Minyard:
"Some small fixes for various things, nothing huge, mostly found by
automated tools.
Plus add a driver that allows Linux to act as an IPMB slave device, so
it can be a satellite MC in an IPMI network"
* tag 'for-linus-5.3' of git://github.com/cminyard/linux-ipmi:
docs: ipmb: place it at driver-api and convert to ReST
fix platform_no_drv_owner.cocci warnings
ipmi: ipmb: don't allocate i2c_client on stack
ipmi: ipmb: Fix build error while CONFIG_I2C is set to m
Add support for IPMB driver
drivers: ipmi: Drop device reference
ipmi_ssif: fix unexpected driver unregister warning
ipmi_si: use bool type for initialized variable
ipmi_si: fix unexpected driver unregister warning
The driver_find_device() accepts a match function pointer to
filter the devices for lookup, similar to bus/class_find_device().
However, there is a minor difference in the prototype for the
match parameter for driver_find_device() with the now unified
version accepted by {bus/class}_find_device(), where it doesn't
accept a "const" qualifier for the data argument. This prevents
us from reusing the generic match functions for driver_find_device().
For this reason, change the prototype of the driver_find_device() to
make the "match" parameter in line with {bus/class}_find_device()
and adjust its callers to use the const qualifier. Also, we could
now promote the "data" parameter to const as we pass it down
as a const parameter to the match functions.
Cc: Corey Minyard <minyard@acm.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: Sebastian Ott <sebott@linux.ibm.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Nehal Shah <nehal-bakulchandra.shah@amd.com>
Cc: Shyam Sundar S K <shyam-sundar.s-k@amd.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There is an arbitrary difference between the prototypes of
bus_find_device() and class_find_device() preventing their callers
from passing the same pair of data and match() arguments to both of
them, which is the const qualifier used in the prototype of
class_find_device(). If that qualifier is also used in the
bus_find_device() prototype, it will be possible to pass the same
match() callback function to both bus_find_device() and
class_find_device(), which will allow some optimizations to be made in
order to avoid code duplication going forward. Also with that, constify
the "data" parameter as it is passed as a const to the match function.
For this reason, change the prototype of bus_find_device() to match
the prototype of class_find_device() and adjust its callers to use the
const qualifier in accordance with the new prototype of it.
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Corey Minyard <minyard@acm.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David Kershner <david.kershner@unisys.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: David Airlie <airlied@linux.ie>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Harald Freudenberger <freude@linux.ibm.com>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michael Jamet <michael.jamet@intel.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: Sebastian Ott <sebott@linux.ibm.com>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Yehezkel Bernat <YehezkelShB@gmail.com>
Cc: rafael@kernel.org
Acked-by: Corey Minyard <minyard@acm.org>
Acked-by: David Kershner <david.kershner@unisys.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Wolfram Sang <wsa@the-dreams.de> # for the I2C parts
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/char/ipmi/ipmb_dev_int.c:352:3-8: No need to set .owner here. The core will do it.
Remove .owner field if calls are used which set it automatically
Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci
Fixes: 51bd6f2915 ("Add support for IPMB driver")
CC: Asmaa Mnebhi <Asmaa@mellanox.com>
Signed-off-by: kbuild test robot <lkp@intel.com>
Message-Id: <20190623185044.GA94834@lkp-kbuild21>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The i2c_client structure can be fairly large, which leads to
a warning about possible kernel stack overflow in some
configurations:
drivers/char/ipmi/ipmb_dev_int.c:115:16: error: stack frame size of 1032 bytes in function 'ipmb_write' [-Werror,-Wframe-larger-than=]
There is no real reason to even declare an i2c_client, as we can simply
call i2c_smbus_xfer() directly instead of the i2c_smbus_write_block_data()
wrapper.
Convert the ipmb_write() to use an open-coded i2c_smbus_write_block_data()
here, without changing the behavior.
It seems that there is another problem with this implementation;
when user space passes a length of more than I2C_SMBUS_BLOCK_MAX
bytes, all the rest is silently ignored. This should probably be
addressed in a separate patch, but I don't know what the intended
behavior is here.
Fixes: 51bd6f2915 ("Add support for IPMB driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Message-Id: <20190619125045.918700-1-arnd@arndb.de>
Acked-by: Asmaa Mnebhi <Asmaa@mellanox.com>
[Broke up a line >80 characters on i2c_smbus_xfer().]
Signed-off-by: Corey Minyard <cminyard@mvista.com>
If CONFIG_I2C is m and CONFIG_I2C_SLAVE is y,
building with CONFIG_IPMB_DEVICE_INTERFACE setting to
y will fail:
drivers/char/ipmi/ipmb_dev_int.o: In function `ipmb_remove':
ipmb_dev_int.c: undefined reference to `i2c_slave_unregister'
drivers/char/ipmi/ipmb_dev_int.o: In function `ipmb_write':
ipmb_dev_int.c: undefined reference to `i2c_smbus_write_block_data'
drivers/char/ipmi/ipmb_dev_int.o: In function `ipmb_probe':
ipmb_dev_int.c: undefined reference to `i2c_slave_register'
drivers/char/ipmi/ipmb_dev_int.o: In function `ipmb_driver_init':
ipmb_dev_int.c: undefined reference to `i2c_register_driver'
drivers/char/ipmi/ipmb_dev_int.o: In function `ipmb_driver_exit':
ipmb_dev_int.c: undefined reference to `i2c_del_driver'
Add I2C Kconfig dependency to fix this.
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: 51bd6f2915 ("Add support for IPMB driver")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Message-Id: <20190612031825.24732-1-yuehaibing@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Support receiving IPMB requests on a Satellite MC from the BMC.
Once a response is ready, this driver will send back a response
to the BMC via the IPMB channel.
Signed-off-by: Asmaa Mnebhi <Asmaa@mellanox.com>
Acked-by: vadimp@mellanox.com
Message-Id: <319690553a0da2a1e80b400941341081b383e5f1.1560192707.git.Asmaa@mellanox.com>
[Move the config option to outside the ipmi msghandler, as it's not
dependent on that. Fixed one small whitespace issue.]
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Drop the reference to a device found via bus_find_device()
Cc: Corey Minyard <minyard@acm.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Message-Id: <1559577023-558-3-git-send-email-suzuki.poulose@arm.com>
[Moved the put_device() to after the platform_device_unregister(), for
better style.]
Signed-off-by: Corey Minyard <cminyard@mvista.com>
If platform_driver_register() fails from init_ipmi_ssif(),
platform_driver_unregister() called unconditionally will
trigger following warning,
ipmi_ssif: Unable to register driver: -12
------------[ cut here ]------------
Unexpected driver unregister!
WARNING: CPU: 1 PID: 6305 at drivers/base/driver.c:193 driver_unregister+0x60/0x70 drivers/base/driver.c:193
Fix it by adding platform_registered variable, only unregister platform
driver when it is already successfully registered.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Message-Id: <20190524143724.43218-1-wangkefeng.wang@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cover 'int' to 'bool' type for initialized variable.
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Message-Id: <20190517101245.4341-2-wangkefeng.wang@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
If ipmi_si_platform_init()->platform_driver_register() fails,
platform_driver_unregister() called unconditionally will trigger
following warning,
ipmi_platform: Unable to register driver: -12
------------[ cut here ]------------
Unexpected driver unregister!
WARNING: CPU: 1 PID: 7210 at drivers/base/driver.c:193 driver_unregister+0x60/0x70 drivers/base/driver.c:193
Fix it by adding platform_registered variable, only unregister platform
driver when it is already successfully registered.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Message-Id: <20190517101245.4341-1-wangkefeng.wang@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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Merge tag 'for-linus-5.2' of git://github.com/cminyard/linux-ipmi
Pull IPMI updates from Corey Minyard:
"Some minor cleanups for the IPMI driver"
* tag 'for-linus-5.2' of git://github.com/cminyard/linux-ipmi:
ipmi: Remove warning if no slave address is present
ipmi:ssif: Only unregister the platform driver if it was registered
ipmi:ssif: compare block number correctly for multi-part return messages
ipmi: Add the i2c-addr property for SSIF interfaces
char/ipmi: fix spelling mistake "receieved_messages" -> "received_messages"
ipmi: avoid atomic_inc in exit function
ipmi: Remove file from ipmi_file_private
ipmi_si: remove an unused variable in try_smi_init()
ipmi: Make ipmi_interfaces_srcu variable static
Using scripts/coccinelle/api/stream_open.cocci added in 10dce8af34
("fs: stream_open - opener for stream-like files so that read and write
can run simultaneously without deadlock"), search and convert to
stream_open all in-kernel nonseekable_open users for which read and
write actually do not depend on ppos and where there is no other methods
in file_operations which assume @offset access.
I've verified each generated change manually - that it is correct to convert -
and each other nonseekable_open instance left - that it is either not correct
to convert there, or that it is not converted due to current stream_open.cocci
limitations. The script also does not convert files that should be valid to
convert, but that currently have .llseek = noop_llseek or generic_file_llseek
for unknown reason despite file being opened with nonseekable_open (e.g.
drivers/input/mousedev.c)
Among cases converted 14 were potentially vulnerable to read vs write deadlock
(see details in 10dce8af34):
drivers/char/pcmcia/cm4000_cs.c:1685:7-23: ERROR: cm4000_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/gnss/core.c:45:1-17: ERROR: gnss_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/hid/uhid.c:635:1-17: ERROR: uhid_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/infiniband/core/user_mad.c:988:1-17: ERROR: umad_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/input/evdev.c:527:1-17: ERROR: evdev_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/input/misc/uinput.c:401:1-17: ERROR: uinput_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/isdn/capi/capi.c:963:8-24: ERROR: capi_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/leds/uleds.c:77:1-17: ERROR: uleds_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/media/rc/lirc_dev.c:198:1-17: ERROR: lirc_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/s390/char/fs3270.c:488:1-17: ERROR: fs3270_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/usb/misc/ldusb.c:310:1-17: ERROR: ld_usb_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
drivers/xen/evtchn.c:667:8-24: ERROR: evtchn_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
net/batman-adv/icmp_socket.c:80:1-17: ERROR: batadv_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
net/rfkill/core.c:1146:8-24: ERROR: rfkill_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
and the rest were just safe to convert to stream_open because their read and
write do not use ppos at all and corresponding file_operations do not
have methods that assume @offset file access(*):
arch/powerpc/platforms/52xx/mpc52xx_gpt.c:631:8-24: WARNING: mpc52xx_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_ibox_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_ibox_stat_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_mbox_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_mbox_stat_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_wbox_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_wbox_stat_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/um/drivers/harddog_kern.c:88:8-24: WARNING: harddog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
arch/x86/kernel/cpu/microcode/core.c:430:33-49: WARNING: microcode_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/char/ds1620.c:215:8-24: WARNING: ds1620_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/char/dtlk.c:301:1-17: WARNING: dtlk_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/char/ipmi/ipmi_watchdog.c:840:9-25: WARNING: ipmi_wdog_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/char/pcmcia/scr24x_cs.c:95:8-24: WARNING: scr24x_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/char/tb0219.c:246:9-25: WARNING: tb0219_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/firewire/nosy.c:306:8-24: WARNING: nosy_ops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/hwmon/fschmd.c:840:8-24: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/hwmon/w83793.c:1344:8-24: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/infiniband/core/ucma.c:1747:8-24: WARNING: ucma_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/infiniband/core/ucm.c:1178:8-24: WARNING: ucm_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/infiniband/core/uverbs_main.c:1086:8-24: WARNING: uverbs_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/input/joydev.c:282:1-17: WARNING: joydev_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/pci/switch/switchtec.c:393:1-17: WARNING: switchtec_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/platform/chrome/cros_ec_debugfs.c:135:8-24: WARNING: cros_ec_console_log_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/rtc/rtc-ds1374.c:470:9-25: WARNING: ds1374_wdt_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/rtc/rtc-m41t80.c:805:9-25: WARNING: wdt_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/s390/char/tape_char.c:293:2-18: WARNING: tape_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/s390/char/zcore.c:194:8-24: WARNING: zcore_reipl_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/s390/crypto/zcrypt_api.c:528:8-24: WARNING: zcrypt_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/spi/spidev.c:594:1-17: WARNING: spidev_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/staging/pi433/pi433_if.c:974:1-17: WARNING: pi433_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/acquirewdt.c:203:8-24: WARNING: acq_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/advantechwdt.c:202:8-24: WARNING: advwdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/alim1535_wdt.c:252:8-24: WARNING: ali_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/alim7101_wdt.c:217:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/ar7_wdt.c:166:8-24: WARNING: ar7_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/at91rm9200_wdt.c:113:8-24: WARNING: at91wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/ath79_wdt.c:135:8-24: WARNING: ath79_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/bcm63xx_wdt.c:119:8-24: WARNING: bcm63xx_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/cpu5wdt.c:143:8-24: WARNING: cpu5wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/cpwd.c:397:8-24: WARNING: cpwd_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/eurotechwdt.c:319:8-24: WARNING: eurwdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/f71808e_wdt.c:528:8-24: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/gef_wdt.c:232:8-24: WARNING: gef_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/geodewdt.c:95:8-24: WARNING: geodewdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/ib700wdt.c:241:8-24: WARNING: ibwdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/ibmasr.c:326:8-24: WARNING: asr_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/indydog.c:80:8-24: WARNING: indydog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/intel_scu_watchdog.c:307:8-24: WARNING: intel_scu_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/iop_wdt.c:104:8-24: WARNING: iop_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/it8712f_wdt.c:330:8-24: WARNING: it8712f_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/ixp4xx_wdt.c:68:8-24: WARNING: ixp4xx_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/ks8695_wdt.c:145:8-24: WARNING: ks8695wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/m54xx_wdt.c:88:8-24: WARNING: m54xx_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/machzwd.c:336:8-24: WARNING: zf_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/mixcomwd.c:153:8-24: WARNING: mixcomwd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/mtx-1_wdt.c:121:8-24: WARNING: mtx1_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/mv64x60_wdt.c:136:8-24: WARNING: mv64x60_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/nuc900_wdt.c:134:8-24: WARNING: nuc900wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/nv_tco.c:164:8-24: WARNING: nv_tco_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pc87413_wdt.c:289:8-24: WARNING: pc87413_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pcwd.c:698:8-24: WARNING: pcwd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pcwd.c:737:8-24: WARNING: pcwd_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pcwd_pci.c:581:8-24: WARNING: pcipcwd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pcwd_pci.c:623:8-24: WARNING: pcipcwd_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pcwd_usb.c:488:8-24: WARNING: usb_pcwd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pcwd_usb.c:527:8-24: WARNING: usb_pcwd_temperature_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pika_wdt.c:121:8-24: WARNING: pikawdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/pnx833x_wdt.c:119:8-24: WARNING: pnx833x_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/rc32434_wdt.c:153:8-24: WARNING: rc32434_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/rdc321x_wdt.c:145:8-24: WARNING: rdc321x_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/riowd.c:79:1-17: WARNING: riowd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sa1100_wdt.c:62:8-24: WARNING: sa1100dog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sbc60xxwdt.c:211:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sbc7240_wdt.c:139:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sbc8360.c:274:8-24: WARNING: sbc8360_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sbc_epx_c3.c:81:8-24: WARNING: epx_c3_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sbc_fitpc2_wdt.c:78:8-24: WARNING: fitpc2_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sb_wdog.c:108:1-17: WARNING: sbwdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sc1200wdt.c:181:8-24: WARNING: sc1200wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sc520_wdt.c:261:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/sch311x_wdt.c:319:8-24: WARNING: sch311x_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/scx200_wdt.c:105:8-24: WARNING: scx200_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/smsc37b787_wdt.c:369:8-24: WARNING: wb_smsc_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/w83877f_wdt.c:227:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/w83977f_wdt.c:301:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wafer5823wdt.c:200:8-24: WARNING: wafwdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/watchdog_dev.c:828:8-24: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdrtas.c:379:8-24: WARNING: wdrtas_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdrtas.c:445:8-24: WARNING: wdrtas_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdt285.c:104:1-17: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdt977.c:276:8-24: WARNING: wdt977_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdt.c:424:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdt.c:484:8-24: WARNING: wdt_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdt_pci.c:464:8-24: WARNING: wdtpci_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open.
drivers/watchdog/wdt_pci.c:527:8-24: WARNING: wdtpci_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
net/batman-adv/log.c:105:1-17: WARNING: batadv_log_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
sound/core/control.c:57:7-23: WARNING: snd_ctl_f_ops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
sound/core/rawmidi.c:385:7-23: WARNING: snd_rawmidi_f_ops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
sound/core/seq/seq_clientmgr.c:310:7-23: WARNING: snd_seq_f_ops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open.
sound/core/timer.c:1428:7-23: WARNING: snd_timer_f_ops: .read() has stream semantic; safe to change nonseekable_open -> stream_open.
One can also recheck/review the patch via generating it with explanation comments included via
$ make coccicheck MODE=patch COCCI=scripts/coccinelle/api/stream_open.cocci SPFLAGS="-D explain"
(*) This second group also contains cases with read/write deadlocks that
stream_open.cocci don't yet detect, but which are still valid to convert to
stream_open since ppos is not used. For example drivers/pci/switch/switchtec.c
calls wait_for_completion_interruptible() in its .read, but stream_open.cocci
currently detects only "wait_event*" as blocking.
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Yongzhi Pan <panyongzhi@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Tejun Heo <tj@kernel.org>
Cc: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Nikolaus Rath <Nikolaus@rath.org>
Cc: Han-Wen Nienhuys <hanwen@google.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James R. Van Zandt" <jrv@vanzandt.mv.com>
Cc: Corey Minyard <minyard@acm.org>
Cc: Harald Welte <laforge@gnumonks.org>
Acked-by: Lubomir Rintel <lkundrak@v3.sk> [scr24x_cs]
Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Johan Hovold <johan@kernel.org>
Cc: David Herrmann <dh.herrmann@googlemail.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Jean Delvare <jdelvare@suse.com>
Acked-by: Guenter Roeck <linux@roeck-us.net> [watchdog/* hwmon/*]
Cc: Rudolf Marek <r.marek@assembler.cz>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Kurt Schwemmer <kurt.schwemmer@microsemi.com>
Acked-by: Logan Gunthorpe <logang@deltatee.com> [drivers/pci/switch/switchtec]
Acked-by: Bjorn Helgaas <bhelgaas@google.com> [drivers/pci/switch/switchtec]
Cc: Benson Leung <bleung@chromium.org>
Acked-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> [platform/chrome]
Cc: Alessandro Zummo <a.zummo@towertech.it>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> [rtc/*]
Cc: Mark Brown <broonie@kernel.org>
Cc: Wim Van Sebroeck <wim@linux-watchdog.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Zwane Mwaikambo <zwanem@gmail.com>
Cc: Marek Lindner <mareklindner@neomailbox.ch>
Cc: Simon Wunderlich <sw@simonwunderlich.de>
Cc: Antonio Quartulli <a@unstable.cc>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Signed-off-by: Kirill Smelkov <kirr@nexedi.com>
It's just noise, really, lots of systems don't have it.
Reported-by: Kamlakant Patel <kamlakantp@marvell.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
According to ipmi spec, block number is a number that is incremented,
starting with 0, for each new block of message data returned using the
middle transaction.
Here, the 'blocknum' is data[0] which always starts from zero(0) and
'ssif_info->multi_pos' starts from 1.
So, we need to add +1 to blocknum while comparing with multi_pos.
Fixes: 7d6380cd40 ("ipmi:ssif: Fix handling of multi-part return messages").
Reported-by: Kiran Kolukuluru <kirank@ami.com>
Signed-off-by: Kamlakant Patel <kamlakantp@marvell.com>
Message-Id: <1556106615-18722-1-git-send-email-kamlakantp@marvell.com>
[Also added a debug log if the block numbers don't match.]
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: stable@vger.kernel.org # 4.4
This is required for SSIF to work.
There was no way to know if the interface being added was SI
or SSIF from the platform data, but that was required so the
i2c-addr is only added for SSIF interfaces. So add a field
for that.
Also rework the logic a bit so that ipmi-type is not set
for SSIF interfaces, as it is not necessary for that.
Fixes: 3cd83bac48 ("ipmi: Consolidate the adding of platform devices")
Reported-by: Kamlakant Patel <kamlakantp@marvell.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: stable@vger.kernel.org # 5.1
This causes a link failure on ARM in certain configurations,
when we reference each atomic operation from .alt.smp.init in
order to patch out atomics on non-SMP systems:
`.exit.text' referenced in section `.alt.smp.init' of drivers/char/ipmi/ipmi_msghandler.o: defined in discarded section `.exit.text' of drivers/char/ipmi/ipmi_msghandler.o
In this case, we can trivially replace the atomic_inc() with
an atomic_set() that has the same effect and does not require
a fixup.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Message-Id: <20190415155509.3565087-1-arnd@arndb.de>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The "init_name" variable isn't used any more after commit 90b2d4f15f
("ipmi_si: Remove hacks for adding a dummy platform devices").
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Message-Id: <20190322065426.GB12551@kadam>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Fix sparse warning:
drivers/char/ipmi/ipmi_msghandler.c:635:20: warning:
symbol 'ipmi_interfaces_srcu' was not declared. Should it be static?
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Message-Id: <20190320133505.21984-1-yuehaibing@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The intended behavior of function ipmi_hardcode_init_one() is to default
to kcs interface when no type argument is presented when initializing
ipmi with hard coded addresses.
However, the array of char pointers allocated on the stack by function
ipmi_hardcode_init() was not inited to zeroes, so it contained stack
debris.
Consequently, passing the cruft stored in this array to function
ipmi_hardcode_init_one() caused a crash when it was unable to detect
that the char * being passed was nonsense and tried to access the
address specified by the bogus pointer.
The fix is simply to initialize the si_type array to zeroes, so if
there were no type argument given to at the command line, function
ipmi_hardcode_init_one() could properly default to the kcs interface.
Signed-off-by: Tony Camuso <tcamuso@redhat.com>
Message-Id: <1554837603-40299-1-git-send-email-tcamuso@redhat.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
An extra memset was put into a place that cleared the interface
type.
Reported-by: Tony Camuso <tcamuso@redhat.com>
Fixes: 3cd83bac48 ("ipmi: Consolidate the adding of platform devices")
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The "ival" variable needs to signed so that we don't read before the
start of the str[] array. This would only happen the user passed in a
module parameter that was just comprised of space characters.
Fixes: e80444ae4fc3 ("ipmi_si: Switch hotmod to use a platform device")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Message-Id: <20190222195530.GA306@kadam>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
When a hotmod-added device is removed or when the module is removed,
remove the platform devices that was created for it.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Instead of keeping track of each one, just scan the platform bus
for hardcode devices and remove them.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
It was being done in two different places now that hard-coded devices
use platform devices, and it's about to be three with hotmod switching
to platform devices. So put the code in one place.
This required some rework on some interfaces to make the type space
clean.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
When excuting a command like:
modprobe ipmi_si ports=0xffc0e3 type=bt
The system would get an oops.
The trouble here is that ipmi_si_hardcode_find_bmc() is called before
ipmi_si_platform_init(), but initialization of the hard-coded device
creates an IPMI platform device, which won't be initialized yet.
The real trouble is that hard-coded devices aren't created with
any device, and the fixup is done later. So do it right, create the
hard-coded devices as normal platform devices.
This required adding some new resource types to the IPMI platform
code for passing information required by the hard-coded device
and adding some code to remove the hard-coded platform devices
on module removal.
To enforce the "hard-coded devices passed by the user take priority
over firmware devices" rule, some special code was added to check
and see if a hard-coded device already exists.
Reported-by: Yang Yingliang <yangyingliang@huawei.com>
Cc: stable@vger.kernel.org # v4.15+
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Yang Yingliang <yangyingliang@huawei.com>
Use guid_copy() instead of memcpy() to hide guid_t implementation details and
to show we expect guid_t in a raw buffer.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Instead of magic number use pre-defined constant for UUID binary and
string representations.
While here, drop the implementation details of guid_t type.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[Also converted a "17" in the error string to UUID_SIZE + 1]
Signed-off-by: Corey Minyard <cminyard@mvista.com>
devm_kasprintf() may return NULL if internal allocation failed so this
assignment is not safe. Moved the error exit path and added the !NULL
which then allows the devres manager to take care of cleanup.
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: cd2315d471 ("ipmi: kcs_bmc: don't change device name")
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: Haiyue Wang <haiyue.wang@linux.intel.com>
The user can ask the message to be returned even if it didn't supply
enough memory for the data, and it will return an error but still
fills in as much data as possible. However, the return value
wasn't being set to an error, it was being overwritten. Create a
second return value for that case.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Trivial fix to clean up an indentation issue, remove space
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The code to tell the lower layer to enable or disable watching for
certain things was lazy in disabling, it waited until a timer tick
to see if a disable was necessary. Not a really big deal, but it
could be improved.
Modify the code to enable and disable watching immediately and don't
do it from the background timer any more.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Kamlakant Patel <kamlakant.patel@cavium.com>
The IPMI driver has a mechanism to tell the lower layers it needs
to watch for messages, commands, and watchdogs (so it doesn't
needlessly poll). However, it needed some extensions, it needed
a way to tell what is being waited for so it could set the timeout
appropriately.
The update to the lower layer was also being done once a second
at best because it was done in the main timeout handler. However,
if a command is sent and a response message is coming back,
it needed to be started immediately. So modify the code to
update immediately if it needs to be enabled. Disable is still
lazy.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Kamlakant Patel <kamlakant.patel@cavium.com>
Commit 89986496de ("ipmi: Turn off all activity on an idle ipmi
interface") modified the IPMI code to only request events when the
driver had somethine waiting for events. The SSIF code, however,
was using the event fetch request to also fetch the flags.
Add a timer and the proper handling for the upper layer telling
whether flags fetches are required.
Reported-by: Kamlakant Patel <Kamlakant.Patel@cavium.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Kamlakant Patel <kamlakant.patel@cavium.com>
The IPMI driver was recently modified to use SRCU, but it turns out
this uses a chunk of percpu memory, even if IPMI is never used.
So modify thing to on initialize on the first use. There was already
code to sort of handle this for handling init races, so piggy back
on top of that, and simplify it in the process.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reported-by: Tejun Heo <tj@kernel.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org # 4.18
Some IPMI modules (e.g. ibmpex_msg_handler()) will have ipmi_usr_hdlr
handlers that call ipmi_free_recv_msg() directly. This will essentially
kfree(msg), leading to use-after-free.
This does not happen in the ipmi_devintf module, which will queue the
message and run ipmi_free_recv_msg() later.
BUG: KASAN: use-after-free in deliver_response+0x12f/0x1b0
Read of size 8 at addr ffff888a7bf20018 by task ksoftirqd/3/27
CPU: 3 PID: 27 Comm: ksoftirqd/3 Tainted: G O 4.19.11-amd64-ani99-debug #12.0.1.601133+pv
Hardware name: AppNeta r1000/X11SPW-TF, BIOS 2.1a-AP 09/17/2018
Call Trace:
dump_stack+0x92/0xeb
print_address_description+0x73/0x290
kasan_report+0x258/0x380
deliver_response+0x12f/0x1b0
? ipmi_free_recv_msg+0x50/0x50
deliver_local_response+0xe/0x50
handle_one_recv_msg+0x37a/0x21d0
handle_new_recv_msgs+0x1ce/0x440
...
Allocated by task 9885:
kasan_kmalloc+0xa0/0xd0
kmem_cache_alloc_trace+0x116/0x290
ipmi_alloc_recv_msg+0x28/0x70
i_ipmi_request+0xb4a/0x1640
ipmi_request_settime+0x1b8/0x1e0
...
Freed by task 27:
__kasan_slab_free+0x12e/0x180
kfree+0xe9/0x280
deliver_response+0x122/0x1b0
deliver_local_response+0xe/0x50
handle_one_recv_msg+0x37a/0x21d0
handle_new_recv_msgs+0x1ce/0x440
tasklet_action_common.isra.19+0xc4/0x250
__do_softirq+0x11f/0x51f
Fixes: e86ee2d44b ("ipmi: Rework locking and shutdown for hot remove")
Cc: stable@vger.kernel.org # 4.18
Signed-off-by: Fred Klassen <fklassen@appneta.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
channel and addr->channel are indirectly controlled by user-space,
hence leading to a potential exploitation of the Spectre variant 1
vulnerability.
These issues were detected with the help of Smatch:
drivers/char/ipmi/ipmi_msghandler.c:1381 ipmi_set_my_address() warn: potential spectre issue 'user->intf->addrinfo' [w] (local cap)
drivers/char/ipmi/ipmi_msghandler.c:1401 ipmi_get_my_address() warn: potential spectre issue 'user->intf->addrinfo' [r] (local cap)
drivers/char/ipmi/ipmi_msghandler.c:1421 ipmi_set_my_LUN() warn: potential spectre issue 'user->intf->addrinfo' [w] (local cap)
drivers/char/ipmi/ipmi_msghandler.c:1441 ipmi_get_my_LUN() warn: potential spectre issue 'user->intf->addrinfo' [r] (local cap)
drivers/char/ipmi/ipmi_msghandler.c:2260 check_addr() warn: potential spectre issue 'intf->addrinfo' [r] (local cap)
Fix this by sanitizing channel and addr->channel before using them to
index user->intf->addrinfo and intf->addrinfo, correspondingly.
Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].
[1] https://lore.kernel.org/lkml/20180423164740.GY17484@dhcp22.suse.cz/
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The block number was not being compared right, it was off by one
when checking the response.
Some statistics wouldn't be incremented properly in some cases.
Check to see if that middle-part messages always have 31 bytes of
data.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: stable@vger.kernel.org # 4.4
Now that synchronize_rcu() waits for preempt-disable regions of code
as well as RCU read-side critical sections, synchronize_sched() can be
replaced by synchronize_rcu(). This commit therefore makes this change.
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <openipmi-developer@lists.sourceforge.net>
Acked-by: Corey Minyard <cminyard@mvista.com>
The spec was fairly confusing about how multi-part transmit messages
worked, so the original implementation only added support for two
part messages. But after talking about it with others and finding
something I missed, I think it makes more sense.
The spec mentions smbus command 8 in a table at the end of the
section on SSIF support as the end transaction. If that works,
then all is good and as it should be. However, some implementations
seem to use a middle transaction <32 bytes tomark the end because of the
confusion in the spec, even though that is an SMBus violation if
the number of bytes is zero.
So this change adds some tests, if command=8 works, it uses that,
otherwise if an empty end transaction works, it uses a middle
transaction <32 bytes to mark the end. If neither works, then
it limits the size to 63 bytes as it is now.
Cc: Harri Hakkarainen <harri@cavium.com>
Cc: Bazhenov, Dmitry <dmitry.bazhenov@auriga.com>
Cc: Mach, Dat <Dat.Mach@cavium.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The IPMI DMI code was adding platform overrides, which is not
really an ideal solution. Switch to using the id_table in
the drivers to identify the devices.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Fixes gcc '-Wunused-but-set-variable' warning:
drivers/char/ipmi/ipmi_msghandler.c: In function 'ipmi_set_my_LUN':
drivers/char/ipmi/ipmi_msghandler.c:1335:13: warning:
variable 'rv' set but not used [-Wunused-but-set-variable]
int index, rv = 0;
'rv' should be the correct return value.
Fixes: 048f7c3e35 ("ipmi: Properly release srcu locks on error conditions")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cleanups, do the replacement and change the levels to the proper
ones for the function they are serving, as many were wrong.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Looking at logs from systems all over the place, it looks like tons
of broken systems exist that set the base address to zero. I can
only guess that is some sort of non-standard idea to mark the
interface as not being present. It can't be zero, anyway, so just
complain and ignore it.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
getnstimeofday64() is deprecated because of the inconsistent naming,
it is only a wrapper around ktime_get_real_ts64() now, which could be
used as a direct replacement.
However, it is generally better to use CLOCK_MONOTONIC timestamps
where possible, to avoid glitches with a concurrent settimeofday()
or leap second.
The uses in ipmi are either for debugging prints or for comparing against
a prior timestamp, so using a monotonic ktime_get_ts64() is probably
best here.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Shifting unsigned char b by an int type can lead to sign-extension
overflow. For example, if b is 0xff and the shift is 24, then top
bit is sign-extended so the final value passed to writeq has all
the upper 32 bits set. Fix this by casting b to a 64 bit unsigned
before the shift.
Detected by CoverityScan, CID#1465246 ("Unintended sign extension")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
I noticed that 4.17.0 logs the follwing during ipmi_si setup:
ipmi_si 0000:01:04.6: probing via PCI
(NULL device *): Could not setup I/O space
ipmi_si 0000:01:04.6: [mem 0xf5ef0000-0xf5ef00ff] regsize 1 spacing 1 irq 21
Fix the "NULL device *) by moving io.dev assignment before its potential
use by ipmi_pci_probe_regspacing().
Result:
ipmi_si 0000:01:04.6: probing via PCI
ipmi_si 0000:01:04.6: Could not setup I/O space
ipmi_si 0000:01:04.6: [mem 0xf5ef0000-0xf5ef00ff] regsize 1 spacing 1 irq 21
Signed-off-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Use the more common logging style.
Miscellanea:
o Convert old style continuation printks without KERN_CONT to pr_cont
o Coalesce formats
o Realign arguments
o Remove unnecessary casts
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Add and use #define pr_fmt/dev_fmt, and remove #define PFX
This also prefixes some messages that were not previously prefixed.
Miscellanea:
o Convert printk(KERN_<level> to pr_<level>(
o Use %s, __func__ where appropriate
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Standardize the prefixing of output messages using the pr_fmt and dev_fmt
mechanisms instead of a separate #define PFX
Miscellanea:
o Because this message prefix is very long, use a non-standard define
of #define pr_fmt(fmt) "%s" fmt, "IPMI message handler: "
which removes ~170 bytes of object code in an x86-64 defconfig with ipmi
(with even more object code reduction on 32 bit compilations)
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
There is a potential execution path in which function ssif_info_find()
returns NULL, hence there is a NULL pointer dereference when accessing
pointer *addr_info*
Fix this by null checking *addr_info* before dereferencing it.
Addresses-Coverity-ID: 1473145 ("Explicit null dereferenced")
Fixes: e333054a91d1 ("ipmi: Fix I2C client removal in the SSIF driver")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The capabilities detection was being done as part of the normal
state machine, but it was possible for it to be running while
the upper layers of the IPMI driver were initializing the
device, resulting in error and failure to initialize.
Move the capabilities detection to the the detect function,
so it's done before anything else runs on the device. This also
simplifies the state machine and removes some code, as a bonus.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reported-by: Andrew Banman <abanman@hpe.com>
Tested-by: Andrew Banman <abanman@hpe.com>
Cc: <stable@vger.kernel.org>
There were certain situations where ipmi_register_smi() would
return a failure, but the interface would still be registered
and would need to be unregistered. This is obviously a bad
design and resulted in an oops in certain failure cases.
If the interface is started up in ipmi_register_smi(), then
an error occurs, shut down the interface there so the
cleanup can be done properly.
Fix the various smi users, too.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reported-by: Justin Ernst <justin.ernst@hpe.com>
Tested-by: Justin Ernst <justin.ernst@hpe.com>
Cc: Andrew Banman <abanman@hpe.com>
Cc: Russ Anderson <russ.anderson@hpe.com>
Cc: <stable@vger.kernel.org> # 4.18.x
kcs_bmc_alloc(...) calls dev_set_name(...) which is incorrect as most
bus driver frameworks, platform_driver in particular, assume that they
are able to set the device name themselves.
Signed-off-by: Benjamin Fair <benjaminfair@google.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
When kcs_bmc_handle_event calls kcs_force_abort function to handle the
not open (no user running) KCS channel transaction, the returned status
value -ENODEV causes the low level IRQ handler indicating that the irq
was not for him by returning IRQ_NONE. After some time, this IRQ will
be treated to be spurious one, and the exception dump happens.
irq 30: nobody cared (try booting with the "irqpoll" option)
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.10.15-npcm750 #1
Hardware name: NPCMX50 Chip family
[<c010b264>] (unwind_backtrace) from [<c0106930>] (show_stack+0x20/0x24)
[<c0106930>] (show_stack) from [<c03dad38>] (dump_stack+0x8c/0xa0)
[<c03dad38>] (dump_stack) from [<c0168810>] (__report_bad_irq+0x3c/0xdc)
[<c0168810>] (__report_bad_irq) from [<c0168c34>] (note_interrupt+0x29c/0x2ec)
[<c0168c34>] (note_interrupt) from [<c0165c80>] (handle_irq_event_percpu+0x5c/0x68)
[<c0165c80>] (handle_irq_event_percpu) from [<c0165cd4>] (handle_irq_event+0x48/0x6c)
[<c0165cd4>] (handle_irq_event) from [<c0169664>] (handle_fasteoi_irq+0xc8/0x198)
[<c0169664>] (handle_fasteoi_irq) from [<c016529c>] (__handle_domain_irq+0x90/0xe8)
[<c016529c>] (__handle_domain_irq) from [<c01014bc>] (gic_handle_irq+0x58/0x9c)
[<c01014bc>] (gic_handle_irq) from [<c010752c>] (__irq_svc+0x6c/0x90)
Exception stack(0xc0a01de8 to 0xc0a01e30)
1de0: 00002080 c0a6fbc0 00000000 00000000 00000000 c096d294
1e00: 00000000 00000001 dc406400 f03ff100 00000082 c0a01e94 c0a6fbc0 c0a01e38
1e20: 00200102 c01015bc 60000113 ffffffff
[<c010752c>] (__irq_svc) from [<c01015bc>] (__do_softirq+0xbc/0x358)
[<c01015bc>] (__do_softirq) from [<c011c798>] (irq_exit+0xb8/0xec)
[<c011c798>] (irq_exit) from [<c01652a0>] (__handle_domain_irq+0x94/0xe8)
[<c01652a0>] (__handle_domain_irq) from [<c01014bc>] (gic_handle_irq+0x58/0x9c)
[<c01014bc>] (gic_handle_irq) from [<c010752c>] (__irq_svc+0x6c/0x90)
Exception stack(0xc0a01ef8 to 0xc0a01f40)
1ee0: 00000000 000003ae
1f00: dcc0f338 c0111060 c0a00000 c0a0cc44 c0a0cbe4 c0a1c22b c07bc218 00000001
1f20: dcffca40 c0a01f54 c0a01f58 c0a01f48 c0103524 c0103528 60000013 ffffffff
[<c010752c>] (__irq_svc) from [<c0103528>] (arch_cpu_idle+0x48/0x4c)
[<c0103528>] (arch_cpu_idle) from [<c0681390>] (default_idle_call+0x30/0x3c)
[<c0681390>] (default_idle_call) from [<c0156f24>] (do_idle+0xc8/0x134)
[<c0156f24>] (do_idle) from [<c015722c>] (cpu_startup_entry+0x28/0x2c)
[<c015722c>] (cpu_startup_entry) from [<c067ad74>] (rest_init+0x84/0x88)
[<c067ad74>] (rest_init) from [<c0900d44>] (start_kernel+0x388/0x394)
[<c0900d44>] (start_kernel) from [<0000807c>] (0x807c)
handlers:
[<c041c5dc>] npcm7xx_kcs_irq
Disabling IRQ #30
It needs to change the returned status from -ENODEV to 0. The -ENODEV
was originally used to tell the low level IRQ handler that no user was
running, but not consider the IRQ handling desgin.
And multiple KCS channels share one IRQ handler, it needs to check the
IBF flag before doing force abort. If the IBF is set, after handling,
return 0 to low level IRQ handler to indicate that the IRQ is handled.
Signed-off-by: Haiyue Wang <haiyue.wang@linux.intel.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Commit 93c303d204 "ipmi_si: Clean up shutdown a bit" didn't
copy the behavior of the cleanup in one spot, it needed to
check for a non-NULL interface before cleaning it up.
Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Meelis Roos <mroos@linux.ee>
Original kcs_bmc_npcm7xx.c was missing enabling to send interrupt to the
host on writes to output buffer.
This patch fixes it by setting the bits that enables the generation of
IRQn events by hardware control based on the status of the OBF flag.
Signed-off-by: Avi Fishman <AviFishman70@gmail.com>
Reviewed-by: Haiyue Wang <haiyue.wang@linux.intel.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
There was one place where the timeout value for an operation was
not being set, if a capabilities request was done from idle. Move
the timeout value setting to before where that change might be
requested.
IMHO the cause here is the invisible returns in the macros. Maybe
that's a job for later, though.
Reported-by: Nordmark Claes <Claes.Nordmark@tieto.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: stable@vger.kernel.org
Currently, function ssif_remove returns _rv_, which is a variable that
is never initialized.
Fix this by removing variable _rv_ and return 0 instead.
Addresses-Coverity-ID: 1467999 ("Uninitialized scalar variable")
Fixes: 6a0d23ed33 ("ipmi: ipmi_unregister_smi() cannot fail, have it
return void")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
This driver exposes the Keyboard Controller Style (KCS) interface on
Novoton NPCM7xx SoCs as a character device. Such SOCs are commonly used
as a BaseBoard Management Controller (BMC) on a server board, and KCS
interface is commonly used to perform the in-band IPMI communication
between the server and its BMC.
Signed-off-by: Avi Fishman <avifishman70@gmail.com>
Signed-off-by: Haiyue Wang <haiyue.wang@linux.intel.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
There is already an intf_num in the main IPMI device structure, use
a different name in the ipmi_si code to avoid confusion.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Due to changes in the way shutdown is done, it is no longer
required to check that the interface is set.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Move the shutdown handling to a shutdown function called from
the IPMI core code. That makes for a cleaner shutdown.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Move the shutdown handling to a shutdown function called from
the IPMI core code. That makes for a cleaner shutdown.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
To handle hot remove of interfaces, a lot of rework had to be
done to the locking. Several things were switched over to srcu
and shutdown for users and interfaces was added for cleaner
shutdown.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Counters would not be pegged properly on some errors. Have
deliver_response() return an error so the counters can be
incremented properly.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The mutex didn't really serve any useful purpose, from what I can
tell, and it would just get in the way. So remove it.
Removing that required a mutex around the default value setting and
getting, so just use the receive mutex for that.
Also pull the fasync stuff outside of the lock for adding the data
to the queue, since it didn't need to be there.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
This is a cleaner interface and the main IPMI panic handler does setup
required by the watchdog handler.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Users of the IPMI code had their own panic handlers, but the
order was not necessarily right, the base IPMI code would
need to handle the panic first, and the user had no way to
know if the IPMI interface could run at panic time.
Add a panic handler to the user interface, it is called if
non-NULL and the interface the user is on is capable of panic
handling. It also cleans up the panic log handling a bit to
reuse the existing interface loop in the main panic handler.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Simplify things by creating one set of message handling data for
setting the watchdog and doing a heartbeat. Rework the locking
to avoid some (probably not very important) races and to avoid
a fairly unlikely infinite recursion.
Get rid of ipmi_ignore_heartbeat, it wasn't used, and use
watchdog_user to tell if we have a working IPMI device below
us.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
If you send a command to another BMC that might take some extra
time, increase the timeouts temporarily.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
By default the retry timeout is 1 second. Allow that to be modified,
primarily for slow operations, like firmware writes.
Also, the timeout was driven by a 1 second timer, so 1 second really
meant between 0 and 1 second. Set the default to 2 seconds so it
means between 1 and 2 seconds.
Also allow the time the interface automatically stays in mainenance
mode to be modified from it's default 30 seconds.
Also consolidate some of the timeout and retry setup.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
more
This patch allows HP PA-RISC servers like rp3410/rp3440 and the HP C8000
workstation with an IPMI controller that predate IPMI 1.5 to use the standard
poweroff or powercycle commands.
These systems firmware don't set the chassis capability bit in the Get
Device ID, but they do implement the standard poweroff and powercycle
commands.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
This happens when BMC doesn't return any data and the code is trying
to print the value of data[2].
Getting following crash:
[ 484.728410] Unable to handle kernel NULL pointer dereference at virtual address 00000002
[ 484.736496] pgd = ffff0000094a2000
[ 484.739885] [00000002] *pgd=00000047fcffe003, *pud=00000047fcffd003, *pmd=0000000000000000
[ 484.748158] Internal error: Oops: 96000005 [#1] SMP
[...]
[ 485.101451] Call trace:
[...]
[ 485.188473] [<ffff000000a46e68>] msg_done_handler+0x668/0x700 [ipmi_ssif]
[ 485.195249] [<ffff000000a456b8>] ipmi_ssif_thread+0x110/0x128 [ipmi_ssif]
[ 485.202038] [<ffff0000080f1430>] kthread+0x108/0x138
[ 485.206994] [<ffff0000080838e0>] ret_from_fork+0x10/0x30
[ 485.212294] Code: aa1903e1 aa1803e0 b900227f 95fef6a5 (39400aa3)
Adding a check to validate the data len before printing data[2] to fix this issue.
Signed-off-by: Kamlakant Patel <kamlakant.patel@cavium.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Realtek has some sort of "Virtual" IPMI device on the PCI bus as a
KCS controller, but whatever it is, it's not one. Ignore it if seen.
Reported-by: Chris Chiu <chiu@endlessm.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Daniel Drake <drake@endlessm.com>
The IPMI spec states:
The purpose of the SPMI Table is to provide a mechanism that can
be used by the OSPM (an ACPI term for “OS Operating System-directed
configuration and Power Management” essentially meaning an ACPI-aware
OS or OS loader) very early in the boot process, e.g., before the
ability to execute ACPI control methods in the OS is available.
When we are probing IPMI in Linux, ACPI control methods are available,
so we shouldn't be probing using SPMI. It could cause some confusion
during the probing process.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The IPMI spec states:
The purpose of the SPMI Table is to provide a mechanism that can
be used by the OSPM (an ACPI term for “OS Operating System-directed
configuration and Power Management” essentially meaning an ACPI-aware
OS or OS loader) very early in the boot process, e.g., before the
ability to execute ACPI control methods in the OS is available.
When we are probing IPMI in Linux, ACPI control methods are available,
so we shouldn't be probing using SPMI. It could cause some confusion
during the probing process.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Jiandi An <anjiandi@codeaurora.org>
If platform_device_alloc() then we should return -ENOMEM instead of
returning success.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Use the ARRAY_SIZE macro on a array poweroff_functions to determine
size of the array. Improvement suggested by Coccinelle.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The cleanup code for an init failure and for a device removal were
quite similar, consolidate all that into one function.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
device_remove_group() was called on any cleanup, even if the
device attrs had not been added yet. That can occur in certain
error scenarios, so add a flag to know if it has been added.
Also make sure we remove the dev if we added it ourselves.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: stable@vger.kernel.org # 4.15
Cc: Laura Abbott <labbott@redhat.com>
Tested-by: Bill Perkins <wmp@grnwood.net>
And get rid of the license text that is no longer necessary.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Alistair Popple <alistair@popple.id.au>
Cc: Jeremy Kerr <jk@ozlabs.org>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Rocky Craig <rocky.craig@hp.com>
Many for coding-style fixes, and update the poll API with the new
type '__poll_t', this is new commit from linux-4.16-rc1.
Signed-off-by: Haiyue Wang <haiyue.wang@linux.intel.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Addresses-Coverity-ID: 1465255 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Cc: Haiyue Wang <haiyue.wang@linux.intel.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The KCS (Keyboard Controller Style) interface is used to perform in-band
IPMI communication between a server host and its BMC (BaseBoard Management
Controllers).
This driver exposes the KCS interface on ASpeed SOCs (AST2400 and AST2500)
as a character device. Such SOCs are commonly used as BMCs and this driver
implements the BMC side of the KCS interface.
Signed-off-by: Haiyue Wang <haiyue.wang@linux.intel.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Provides a device driver for the KCS (Keyboard Controller Style)
IPMI interface which meets the requirement of the BMC (Baseboard
Management Controllers) side for handling the IPMI request from
host system software.
Signed-off-by: Haiyue Wang <haiyue.wang@linux.intel.com>
[Removed the selectability of IPMI_KCS_BMC, as it doesn't do much
good to have it by itself.]
Signed-off-by: Corey Minyard <cminyard@mvista.com>
This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:
for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
done
with de-mangling cleanups yet to come.
NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do. But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.
The next patch from Al will sort out the final differences, and we
should be all done.
Scripted-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Here is the set of "big" driver core patches for 4.16-rc1.
The majority of the work here is in the firmware subsystem, with reworks
to try to attempt to make the code easier to handle in the long run, but
no functional change. There's also some tree-wide sysfs attribute
fixups with lots of acks from the various subsystem maintainers, as well
as a handful of other normal fixes and changes.
And finally, some license cleanups for the driver core and sysfs code.
All have been in linux-next for a while with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is the set of "big" driver core patches for 4.16-rc1.
The majority of the work here is in the firmware subsystem, with
reworks to try to attempt to make the code easier to handle in the
long run, but no functional change. There's also some tree-wide sysfs
attribute fixups with lots of acks from the various subsystem
maintainers, as well as a handful of other normal fixes and changes.
And finally, some license cleanups for the driver core and sysfs code.
All have been in linux-next for a while with no reported issues"
* tag 'driver-core-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (48 commits)
device property: Define type of PROPERTY_ENRTY_*() macros
device property: Reuse property_entry_free_data()
device property: Move property_entry_free_data() upper
firmware: Fix up docs referring to FIRMWARE_IN_KERNEL
firmware: Drop FIRMWARE_IN_KERNEL Kconfig option
USB: serial: keyspan: Drop firmware Kconfig options
sysfs: remove DEBUG defines
sysfs: use SPDX identifiers
drivers: base: add coredump driver ops
sysfs: add attribute specification for /sysfs/devices/.../coredump
test_firmware: fix missing unlock on error in config_num_requests_store()
test_firmware: make local symbol test_fw_config static
sysfs: turn WARN() into pr_warn()
firmware: Fix a typo in fallback-mechanisms.rst
treewide: Use DEVICE_ATTR_WO
treewide: Use DEVICE_ATTR_RO
treewide: Use DEVICE_ATTR_RW
sysfs.h: Use octal permissions
component: add debugfs support
bus: simple-pm-bus: convert bool SIMPLE_PM_BUS to tristate
...
while (some a long time).
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Merge tag 'for-linus-4.16-1' of git://github.com/cminyard/linux-ipmi
Pull IPMI updates from Corey Minyard:
"Small fixes for various things, been sitting in next for a while (some
a long time)"
* tag 'for-linus-4.16-1' of git://github.com/cminyard/linux-ipmi:
ipmi_ssif: Remove duplicate NULL check
ipmi/powernv: Fix error return code in ipmi_powernv_probe()
ipmi: use dynamic memory for DMI driver override
ipmi/ipmi_powernv: remove outdated todo in powernv IPMI driver
ipmi: Clear smi_info->thread to prevent use-after-free during module unload
ipmi: use correct string length
ipmi_si: Fix error handling of platform device
ipmi watchdog: fix typo in parameter description
ipmi_si_platform: Fix typo in parameter description
Pull poll annotations from Al Viro:
"This introduces a __bitwise type for POLL### bitmap, and propagates
the annotations through the tree. Most of that stuff is as simple as
'make ->poll() instances return __poll_t and do the same to local
variables used to hold the future return value'.
Some of the obvious brainos found in process are fixed (e.g. POLLIN
misspelled as POLL_IN). At that point the amount of sparse warnings is
low and most of them are for genuine bugs - e.g. ->poll() instance
deciding to return -EINVAL instead of a bitmap. I hadn't touched those
in this series - it's large enough as it is.
Another problem it has caught was eventpoll() ABI mess; select.c and
eventpoll.c assumed that corresponding POLL### and EPOLL### were
equal. That's true for some, but not all of them - EPOLL### are
arch-independent, but POLL### are not.
The last commit in this series separates userland POLL### values from
the (now arch-independent) kernel-side ones, converting between them
in the few places where they are copied to/from userland. AFAICS, this
is the least disruptive fix preserving poll(2) ABI and making epoll()
work on all architectures.
As it is, it's simply broken on sparc - try to give it EPOLLWRNORM and
it will trigger only on what would've triggered EPOLLWRBAND on other
architectures. EPOLLWRBAND and EPOLLRDHUP, OTOH, are never triggered
at all on sparc. With this patch they should work consistently on all
architectures"
* 'misc.poll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (37 commits)
make kernel-side POLL... arch-independent
eventpoll: no need to mask the result of epi_item_poll() again
eventpoll: constify struct epoll_event pointers
debugging printk in sg_poll() uses %x to print POLL... bitmap
annotate poll(2) guts
9p: untangle ->poll() mess
->si_band gets POLL... bitmap stored into a user-visible long field
ring_buffer_poll_wait() return value used as return value of ->poll()
the rest of drivers/*: annotate ->poll() instances
media: annotate ->poll() instances
fs: annotate ->poll() instances
ipc, kernel, mm: annotate ->poll() instances
net: annotate ->poll() instances
apparmor: annotate ->poll() instances
tomoyo: annotate ->poll() instances
sound: annotate ->poll() instances
acpi: annotate ->poll() instances
crypto: annotate ->poll() instances
block: annotate ->poll() instances
x86: annotate ->poll() instances
...
Since i2c_unregister_device() became NULL-aware we may remove duplicate
NULL check.
Cc: Corey Minyard <minyard@acm.org>
Cc: openipmi-developer@lists.sourceforge.net
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Fix to return a negative error code from the request_irq() error
handling case instead of 0, as done elsewhere in this function.
Fixes: dce143c338 ("ipmi/powernv: Convert to irq event interface")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Since the IPMI core now queries device IDs dynamically, we no longer
need this todo for implementing this in the powernv driver.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
During code inspection, I found an use-after-free possibility during unloading
ipmi_si in the polling mode.
If start_new_msg() is called after kthread_stop(), the function will try to
wake up non-existing kthread using the dangling pointer.
Possible scenario is when a new internal message is generated after
ipmi_unregister_smi()[*1] and remains after stop_timer_and_thread()
in clenaup_one_si() [*2].
Use-after-free could occur as follows depending on BMC replies.
cleanup_one_si
=> ipmi_unregister_smi
[*1]
=> stop_timer_and_thread
=> kthread_stop(smi_info->thread)
[*2]
=> poll
=> smi_event_handler
=> start_new_msg
=> if (smi_info->thread)
wake_up_process(smi_info->thread) <== use-after-free!!
Although currently it seems no such message is generated in the polling mode,
some changes might introduce that in thefuture. For example in the interrupt
mode, disable_si_irq() does that at [*2].
So let's prevent such a critical issue possibility now.
Signed-off-by: Yamazaki Masamitsu <m-yamazaki@ah.jp.nec.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
gcc-8 reports
drivers/char/ipmi/ipmi_msghandler.c: In function
'panic_op_write_handler':
./include/linux/string.h:245:9: warning: '__builtin_strncpy' specified
bound 16 equals destination size [-Wstringop-truncation]
drivers/char/ipmi/ipmi_watchdog.c: In function 'set_param_str':
./include/linux/string.h:245:9: warning: '__builtin_strncpy' specified
bound 16 equals destination size [-Wstringop-truncation]
We need one less byte or call strlcpy() to make it a nul-terminated
string.
Signed-off-by: Xiongfeng Wang <xiongfeng.wang@linaro.org>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cleanup of platform devices created by the IPMI driver was not
being done correctly and could result in a memory leak. So
create a local boolean to know how to clean up those platform
devices.
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Fix typo in parameter description.
Fixes: 95e300c052 ("ipmi: Make the DMI probe into a generic platform probe")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
have been in for-next for a while, each since about their creation
date. I forgot the bugzilla reference on the second one (ipmi_si: Fix
oops with PCI devices) so I rebased to add that.
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Merge tag 'for-linus-4.15-2' of git://github.com/cminyard/linux-ipmi
Pull IPMI fixes from Corey Minyard.
* tag 'for-linus-4.15-2' of git://github.com/cminyard/linux-ipmi:
ipmi_si: fix crash on parisc
ipmi_si: Fix oops with PCI devices
ipmi: Stop timers before cleaning up the module
This patch fixes ipmi crash on parisc introduced in the kernel 4.15-rc.
The pointer io.io_setup is not initialized and thus it causes crash in
try_smi_init when attempting to call new_smi->io.io_setup.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
When the IPMI PCI code was split out, some code was consolidated for
setting the io_setup field in the io structure. The PCI code needed
this set before registration to probe register spacing, though, so
restore the old code for that function.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=197999
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Meelis Roos <mroos@linux.ee>
System may crash after unloading ipmi_si.ko module
because a timer may remain and fire after the module cleaned up resources.
cleanup_one_si() contains the following processing.
/*
* Make sure that interrupts, the timer and the thread are
* stopped and will not run again.
*/
if (to_clean->irq_cleanup)
to_clean->irq_cleanup(to_clean);
wait_for_timer_and_thread(to_clean);
/*
* Timeouts are stopped, now make sure the interrupts are off
* in the BMC. Note that timers and CPU interrupts are off,
* so no need for locks.
*/
while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
poll(to_clean);
schedule_timeout_uninterruptible(1);
}
si_state changes as following in the while loop calling poll(to_clean).
SI_GETTING_MESSAGES
=> SI_CHECKING_ENABLES
=> SI_SETTING_ENABLES
=> SI_GETTING_EVENTS
=> SI_NORMAL
As written in the code comments above,
timers are expected to stop before the polling loop and not to run again.
But the timer is set again in the following process
when si_state becomes SI_SETTING_ENABLES.
=> poll
=> smi_event_handler
=> handle_transaction_done
// smi_info->si_state == SI_SETTING_ENABLES
=> start_getting_events
=> start_new_msg
=> smi_mod_timer
=> mod_timer
As a result, before the timer set in start_new_msg() expires,
the polling loop may see si_state becoming SI_NORMAL
and the module clean-up finishes.
For example, hard LOCKUP and panic occurred as following.
smi_timeout was called after smi_event_handler,
kcs_event and hangs at port_inb()
trying to access I/O port after release.
[exception RIP: port_inb+19]
RIP: ffffffffc0473053 RSP: ffff88069fdc3d80 RFLAGS: 00000006
RAX: ffff8806800f8e00 RBX: ffff880682bd9400 RCX: 0000000000000000
RDX: 0000000000000ca3 RSI: 0000000000000ca3 RDI: ffff8806800f8e40
RBP: ffff88069fdc3d80 R8: ffffffff81d86dfc R9: ffffffff81e36426
R10: 00000000000509f0 R11: 0000000000100000 R12: 0000000000]:000000
R13: 0000000000000000 R14: 0000000000000246 R15: ffff8806800f8e00
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0000
--- <NMI exception stack> ---
To fix the problem I defined a flag, timer_can_start,
as member of struct smi_info.
The flag is enabled immediately after initializing the timer
and disabled immediately before waiting for timer deletion.
Fixes: 0cfec916e8 ("ipmi: Start the timer and thread on internal msgs")
Signed-off-by: Yamazaki Masamitsu <m-yamazaki@ah.jp.nec.com>
[Adjusted for recent changes in the driver.]
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Pull compat and uaccess updates from Al Viro:
- {get,put}_compat_sigset() series
- assorted compat ioctl stuff
- more set_fs() elimination
- a few more timespec64 conversions
- several removals of pointless access_ok() in places where it was
followed only by non-__ variants of primitives
* 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (24 commits)
coredump: call do_unlinkat directly instead of sys_unlink
fs: expose do_unlinkat for built-in callers
ext4: take handling of EXT4_IOC_GROUP_ADD into a helper, get rid of set_fs()
ipmi: get rid of pointless access_ok()
pi433: sanitize ioctl
cxlflash: get rid of pointless access_ok()
mtdchar: get rid of pointless access_ok()
r128: switch compat ioctls to drm_ioctl_kernel()
selection: get rid of field-by-field copyin
VT_RESIZEX: get rid of field-by-field copyin
i2c compat ioctls: move to ->compat_ioctl()
sched_rr_get_interval(): move compat to native, get rid of set_fs()
mips: switch to {get,put}_compat_sigset()
sparc: switch to {get,put}_compat_sigset()
s390: switch to {get,put}_compat_sigset()
ppc: switch to {get,put}_compat_sigset()
parisc: switch to {get,put}_compat_sigset()
get_compat_sigset()
get rid of {get,put}_compat_itimerspec()
io_getevents: Use timespec64 to represent timeouts
...
This is signed by my new key (919BFF81), which is now signed by my
old key.
This is a fairly large rework of the IPMI code, along with a bunch
of smaller fixes. The major changes have been in the next tree for
a couple of months, so they should be good to do in.
- Some users had IPMI systems where the GUID of the IPMI controller
could change. So rescanning of the GUID was added. The naming of
some sysfs things was dependent on the GUID, however, so this
resulted in the sysfs interface code in IPMI changing to remove that
dependency and name the IPMI BMCs like other sysfs devices.
- The ipmi_si_intf.c code was fairly bloated with all the different
discovery methods (PCI, ACPI, SMBIOS, OF, platform, module parameters,
hot add). The structure of how the interfaces were added was redone
to make them more modular, then the individual methods were pulled
out into their own files.
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Merge tag 'ipmi-for-4.15' of git://github.com/cminyard/linux-ipmi
Pull IPMI updates from Corey Minyard:
"This is a fairly large rework of the IPMI code, along with a bunch of
smaller fixes. The major changes have been in the next tree for a
couple of months, so they should be good to do in.
- Some users had IPMI systems where the GUID of the IPMI controller
could change. So rescanning of the GUID was added. The naming of
some sysfs things was dependent on the GUID, however, so this
resulted in the sysfs interface code in IPMI changing to remove
that dependency and name the IPMI BMCs like other sysfs devices.
- The ipmi_si_intf.c code was fairly bloated with all the different
discovery methods (PCI, ACPI, SMBIOS, OF, platform, module
parameters, hot add). The structure of how the interfaces were
added was redone to make them more modular, then the individual
methods were pulled out into their own files"
* tag 'ipmi-for-4.15' of git://github.com/cminyard/linux-ipmi: (48 commits)
ipmi_si: Delete an error message for a failed memory allocation in try_smi_init()
ipmi_si: fix memory leak on new_smi
ipmi: remove redundant initialization of bmc
ipmi: pr_err() strings should end with newlines
ipmi: Clean up some print operations
ipmi: Make the DMI probe into a generic platform probe
ipmi: Make the IPMI proc interface configurable
ipmi_ssif: Add device attrs for the things in proc
ipmi_si: Add device attrs for the things in proc
ipmi_si: remove ipmi_smi_alloc() function
ipmi_si: Move port and mem I/O handling to their own files
ipmi_si: Get rid of unused spacing and port fields
ipmi_si: Move PARISC handling to another file
ipmi_si: Move PCI setup to another file
ipmi_si: Move platform device handling to another file
ipmi_si: Move hardcode handling to a separate file.
ipmi_si: Move the hotmod handling to another file.
ipmi_si: Change ipmi_si_add_smi() to take just I/O info
ipmi_si: Move io setup into io structure
ipmi_si: Move irq setup handling into the io struct
...
Summary of modules changes for the 4.15 merge window:
- Treewide module_param_call() cleanup, fix up set/get function
prototype mismatches, from Kees Cook
- Minor code cleanups
Signed-off-by: Jessica Yu <jeyu@kernel.org>
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Merge tag 'modules-for-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
Pull module updates from Jessica Yu:
"Summary of modules changes for the 4.15 merge window:
- treewide module_param_call() cleanup, fix up set/get function
prototype mismatches, from Kees Cook
- minor code cleanups"
* tag 'modules-for-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
module: Do not paper over type mismatches in module_param_call()
treewide: Fix function prototypes for module_param_call()
module: Prepare to convert all module_param_call() prototypes
kernel/module: Delete an error message for a failed memory allocation in add_module_usage()
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Several function prototypes for the set/get functions defined by
module_param_call() have a slightly wrong argument types. This fixes
those in an effort to clean up the calls when running under type-enforced
compiler instrumentation for CFI. This is the result of running the
following semantic patch:
@match_module_param_call_function@
declarer name module_param_call;
identifier _name, _set_func, _get_func;
expression _arg, _mode;
@@
module_param_call(_name, _set_func, _get_func, _arg, _mode);
@fix_set_prototype
depends on match_module_param_call_function@
identifier match_module_param_call_function._set_func;
identifier _val, _param;
type _val_type, _param_type;
@@
int _set_func(
-_val_type _val
+const char * _val
,
-_param_type _param
+const struct kernel_param * _param
) { ... }
@fix_get_prototype
depends on match_module_param_call_function@
identifier match_module_param_call_function._get_func;
identifier _val, _param;
type _val_type, _param_type;
@@
int _get_func(
-_val_type _val
+char * _val
,
-_param_type _param
+const struct kernel_param * _param
) { ... }
Two additional by-hand changes are included for places where the above
Coccinelle script didn't notice them:
drivers/platform/x86/thinkpad_acpi.c
fs/lockd/svc.c
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Omit an extra message for a memory allocation failure in this function.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The error exit path omits kfree'ing the allocated new_smi, causing a memory
leak. Fix this by kfree'ing new_smi.
Detected by CoverityScan, CID#14582571 ("Resource Leak")
Fixes: 7e030d6dff ("ipmi: Prefer ACPI system interfaces over SMBIOS ones")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
The pointer bmc is being initialized and this initialized value is
never being read, so this is assignment redundant and can be removed.
Cleans up clang warning:
warning: Value stored to 'bmc' during its initialization is never read
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
pr_err() messages should terminated with a new-line to avoid
other messages being concatenated onto the end.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Get rid of all printfs, using dev_xxx() if a device is available,
pr_xxx() otherwise, and format long strings properly.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Rework the DMI probe function to be a generic platform probe, and
then rework the DMI code (and a few other things) to use the more
generic information. This is so other things can declare platform
IPMI devices.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Create a device attribute for everything we show in proc, getting
ready for removing the proc stuff.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Create a device attribute for everything we show in proc, getting
ready for removing the proc stuff.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Instead of allocating the smi_info structure, filling in the I/O
info, and passing it to ipmi_si_add_smi(), just pass the I/O
info in the io structure and let ipmi_si_add_smi() allocate
the smi_info structure.
This required redoing the way the remove functions for some
device interfaces worked, a new function named
ipmi_si_remove_by_dev() allows the device to be passed in and
detected instead of using driver data, which couldn't be
filled out easily othersize.
After this the platform handling should be decoupled from the
smi_info structure and that handling can be pulled out to its
own files.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
So the platform code can do it without having to access the
smi info, getting ready for pulling the platform handling
section to their own files.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
That's where it belongs, and we are getting ready for moving the
platform handling out of the main ipmi_si_intf.c file.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Vijay Khemka