It's slightly cleaner to zero-out the delayed node upon allocation
than to do it by hand in btrfs_init_delayed_node() for a few members
Signed-off-by: Alexandru Moise <00moses.alexander00@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Alexandru Moise <00moses.alexander00@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Conform to __btrfs_fs_incompat() cast-to-bool (!!) by explicitly
returning boolean not int.
Signed-off-by: Alexandru Moise <00moses.alexander00@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The inode argument is never used from the beginning, so remove it.
Signed-off-by: Byongho Lee <bhlee.kernel@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
A fix for a nasty hardware bug in rk808 and a initialization reordering in
da9063 to fix a possible crash.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=xXh7
-----END PGP SIGNATURE-----
Merge tag 'rtc-4.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC fixes from Alexandre Belloni:
"Late fixes for the RTC subsystem for 4.4:
A fix for a nasty hardware bug in rk808 and an initialization
reordering in da9063 to fix a possible crash"
* tag 'rtc-4.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
rtc: da9063: fix access ordering error during RTC interrupt at system power on
rtc: rk808: Compensate for Rockchip calendar deviation on November 31st
This fix alters the ordering of the IRQ and device registrations in the RTC
driver probe function. This change will apply to the RTC driver that supports
both DA9063 and DA9062 PMICs.
A problem could occur with the existing RTC driver if:
A system is started from a cold boot using the PMIC RTC IRQ to initiate a
power on operation. For instance, if an RTC alarm is used to start a
platform from power off.
The existing driver IRQ is requested before the device has been properly
registered.
i.e.
ret = devm_request_threaded_irq()
comes before
rtc->rtc_dev = devm_rtc_device_register();
In this case, the interrupt can be called before the device has been
registered and the handler can be called immediately. The IRQ handler
da9063_alarm_event() contains the function call
rtc_update_irq(rtc->rtc_dev, 1, RTC_IRQF | RTC_AF);
which in turn tries to access the unavailable rtc->rtc_dev.
The fix is to reorder the functions inside the RTC probe. The IRQ is
requested after the RTC device resource has been registered so that
get_irq_byname is the last thing to happen.
Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
In A.D. 1582 Pope Gregory XIII found that the existing Julian calendar
insufficiently represented reality, and changed the rules about
calculating leap years to account for this. Similarly, in A.D. 2013
Rockchip hardware engineers found that the new Gregorian calendar still
contained flaws, and that the month of November should be counted up to
31 days instead. Unfortunately it takes a long time for calendar changes
to gain widespread adoption, and just like more than 300 years went by
before the last Protestant nation implemented Greg's proposal, we will
have to wait a while until all religions and operating system kernels
acknowledge the inherent advantages of the Rockchip system. Until then
we need to translate dates read from (and written to) Rockchip hardware
back to the Gregorian format.
This patch works by defining Jan 1st, 2016 as the arbitrary anchor date
on which Rockchip and Gregorian calendars are in sync. From that we can
translate arbitrary later dates back and forth by counting the number
of November/December transitons since the anchor date to determine the
offset between the calendars. We choose this method (rather than trying
to regularly "correct" the date stored in hardware) since it's the only
way to ensure perfect time-keeping even if the system may be shut down
for an unknown number of years. The drawback is that other software
reading the same hardware (e.g. mainboard firmware) must use the same
translation convention (including the same anchor date) to be able to
read and write correct timestamps from/to the RTC.
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Here are some tty/serial driver fixes for 4.4-rc6 that resolve some
reported problems. All of these have been in linux-next. The details
are in the shortlog.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iEYEABECAAYFAlZ19rAACgkQMUfUDdst+ykBQQCeKSU7YZFKPTEFbGKS2UfFgMJd
EokAoIJp4lXqhLHKtI7TNwVFlMQAaDYj
=2I3R
-----END PGP SIGNATURE-----
Merge tag 'tty-4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are some tty/serial driver fixes for 4.4-rc6 that resolve some
reported problems. All of these have been in linux-next. The details
are in the shortlog"
* tag 'tty-4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
tty: Fix GPF in flush_to_ldisc()
serial: earlycon: Add missing spinlock initialization
serial: sh-sci: Fix length of scatterlist
n_tty: Fix poll() after buffer-limited eof push read
serial: 8250_uniphier: fix dl_read and dl_write functions
Here are some USB and PHY fixes for 4.4-rc6. All of them resolve some
reported problems. Full details in the shortlog.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iEYEABECAAYFAlZ1+CoACgkQMUfUDdst+yksSQCg1MuW8nVyz7eUHcZnd/r4dSPa
fy8An0J0aKi8IhUMSIAIFcoM4/40ulCE
=ycut
-----END PGP SIGNATURE-----
Merge tag 'usb-4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some USB and PHY fixes for 4.4-rc6. All of them resolve some
reported problems. Full details in the shortlog"
* tag 'usb-4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: fix invalid memory access in hub_activate()
USB: ipaq.c: fix a timeout loop
phy: core: Get a refcount to phy in devm_of_phy_get_by_index()
phy: cygnus: pcie: add missing of_node_put
phy: miphy365x: add missing of_node_put
phy: miphy28lp: add missing of_node_put
phy: rockchip-usb: add missing of_node_put
phy: berlin-sata: add missing of_node_put
phy: mt65xx-usb3: add missing of_node_put
phy: brcmstb-sata: add missing of_node_put
phy: sun9i-usb: add USB dependency
- 2 recently introduced regressions fixed.
- one older bug in RAID10 - tagged for -stable since 4.2
- one minor sysfs api improvement.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=nHNn
-----END PGP SIGNATURE-----
Merge tag 'md/4.4-rc5-fixes' of git://neil.brown.name/md
Pull md fixes from Neil Brown:
"Four fixes for md:
- two recently introduced regressions fixed.
- one older bug in RAID10 - tagged for -stable since 4.2
- one minor sysfs api improvement"
* tag 'md/4.4-rc5-fixes' of git://neil.brown.name/md:
Fix remove_and_add_spares removes drive added as spare in slot_store
md: fix bug due to nested suspend
MD: change journal disk role to disk 0
md/raid10: fix data corruption and crash during resync
- Partial revert of "powerpc: Individual System V IPC system calls"
- pr_warn_once on unsupported OPAL_MSG type from Stewart
- Fix deadlock in opal-irqchip introduced by "Fix double endian conversion" from Alistair
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=58wA
-----END PGP SIGNATURE-----
Merge tag 'powerpc-4.4-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Partial revert of "powerpc: Individual System V IPC system calls"
- pr_warn_once on unsupported OPAL_MSG type from Stewart
- Fix deadlock in opal-irqchip introduced by "Fix double endian
conversion" from Alistair
* tag 'powerpc-4.4-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/opal-irqchip: Fix deadlock introduced by "Fix double endian conversion"
powerpc/powernv: pr_warn_once on unsupported OPAL_MSG type
Partial revert of "powerpc: Individual System V IPC system calls"
A couple of reference counting bugs here, one in spidev and one with
holding an extra reference in the core that we never freed if we removed
a device, plus a driver specific fix. Both of the refcounting bugs are
very old but they've only been found by observation so hopefully their
impact has been low.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJWdUKcAAoJECTWi3JdVIfQO1EH/3aQKNFu1Z5cEaKiBtQ0aZZD
1E/w+OPqmKdaFDlXvwXO+W4UY5m0w0Kg5FPg4wMgpjDJQTiELtLJ3c4BiKp1Du8p
8RHnpqrYtggCZOK2r6iJNonIdIDDIDZMxxu1KHaKl+Wsqh9/1xUsQg7X9xi5Iaiv
fVd+QlhmCfC42lU92urBboPmON31XxaITTM8qNhGvQO77L4FdZHiVMP/bmyephV7
Mr4G7MFZHDZljGqEUhAlamhEiBxmCtQAm0eDhWmbYwN6S3U8L5VSqrkBDbNR08C+
4qnek2PS2/HlkQwMTpgGZpLrLyk04oWgsFMVZQ2275vR9qZlQTgnlEu50roBBD0=
=DMO9
-----END PGP SIGNATURE-----
Merge tag 'spi-fix-v4.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"A couple of reference counting bugs here, one in spidev and one with
holding an extra reference in the core that we never freed if we
removed a device, plus a driver specific fix. Both of the refcounting
bugs are very old but they've only been found by observation so
hopefully their impact has been low"
* tag 'spi-fix-v4.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: fix parent-device reference leak
spi: spidev: Hold spi_lock over all defererences of spi in release()
spi-fsl-dspi: Fix CTAR Register access
- Revert the error number propagation from the .get() vtable
entry temporarily, until we make the proper fixes to all drivers.
- Fix the clamping behaviour in the generic GPIO driver.
- Driver fix for the ath79 driver
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQIcBAABAgAGBQJWdUHfAAoJEEEQszewGV1zN3IP/1t/w6sOIugibcyLTq5EpL1X
0fndqaqoRunZdFpeauTujq4hXXhRDtZdqzcSNWMg5Xelq0ROHIRLeEcX1GEQlROM
t9IfNmsxbso0N02ii4NC5F+jaKitnqeV+ZSzGekQjvTxvF3zJ0EaL/I0dNoImXEl
K6gX36R31DEoxSabRXJrwfUfJFEfDjtriP4m8GTxt/Nd51QcE1WRpDusXK8smuga
UaiZsnb0VzuM4QzZ1BvSFafBk6UpYU0245H1pYlPPcQRIkabZTuBQsEWrcLHAtDX
AjuSqBy/PNYXGEzOVVnv2LETYAhC9KR+t2xXpT9QOXIiAD1XSk1n+UV0doJY22ZW
x02ZTZiurllby/uuTOH7s3ZZ/NNmwoZK16d4F65qrU74fRvuc/9NeODKiizHXn3a
+Z9s1dmRedHe8Q2eN/GLUCOHWZBHGj8kJVEgh1Oi1kaFVnP3GXBAeEEEnmZyrRJR
BRKCQa8LWpXusJPhMsIrPK1M4FyAMFG1EFdq10cvag7UOamIpbK6q3/CIsSD8e1N
FYcBGAOBMhdtyjAd3DXJXUsDqQ8aRL/LZ8hH1epsATiIvrkzHC10/erxSzA2cWtB
URe+oatMGXgS8fQCaqyXZiA7gzxUNePXV3QBPvwWEo/OysnO49280owndACYnCMT
de1R0SvltXC9GzXYVT5t
=bPar
-----END PGP SIGNATURE-----
Merge tag 'gpio-v4.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
"Some GPIO fixes for the v4.4 series. Most prominent: I revert the
error propagation from the .get() function until we can fix up all the
drivers properly for v4.5.
- Revert the error number propagation from the .get() vtable entry
temporarily, until we make the proper fixes to all drivers.
- Fix the clamping behaviour in the generic GPIO driver.
- Driver fix for the ath79 driver"
* tag 'gpio-v4.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: revert get() to non-errorprogating behaviour
gpio: generic: clamp values from bgpio_get_set()
gpio: ath79: Fix the logic to clear offset bit of AR71XX_GPIO_REG_OE register
Pull i2c fixes from Wolfram Sang:
"A set of 'usual' driver bugfixes for the I2C subsystem"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: rcar: disable runtime PM correctly in slave mode
i2c: designware: Keep pm_runtime_enable/_disable calls in sync
i2c: designware: fix IO timeout issue for AMD controller
i2c: imx: init bus recovery info before adding i2c adapter
i2c: do not use 0x in front of %pa
i2c: davinci: Increase module clock frequency
i2c: mv64xxx: The n clockdiv factor is 0 based on sunxi SoCs
i2c: rk3x: populate correct variable for sda_falling_time
When we also are I2C slave, we need to disable runtime PM because the
address detection mechanism needs to be active all the time. However, we
can reenable runtime PM once the slave instance was unregistered. So,
use pm_runtime_get_sync/put to achieve this, since it has proper
refcounting. pm_runtime_allow/forbid is like a global knob controllable
from userspace which is unsuitable here.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
- Fix a potential regression in the generic power domains
framework introduced during the 4.3 development cycle that
may lead to spurious failures of system suspend in certain
situations (Ulf Hansson).
- Fix a problem in the power capping RAPL (Running Average
Power Limits) driver that causes it to initialize successfully
on some systems where it is not supposed to do that which is
due to an incorrect check in an initialization routine (Prarit
Bhargava).
- Fix a build problem in the cpufreq Tegra driver that depends
on the regulator framework, but that dependency is not reflected
in Kconfig (Arnd Bergmann).
- Fix a recent mistake in the intel_pstate driver where a numeric
constant is used directly instead of a symbol defined specifically
for the case in question (Prarit Bhargava).
/
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)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=da89
-----END PGP SIGNATURE-----
Merge tag 'pm+acpi-4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix a potential regression introduced during the 4.3 cycle
(generic power domains framework), a nasty bug that has been present
forever (power capping RAPL driver), a build issue (Tegra cpufreq
driver) and a minor ugliness introduced recently (intel_pstate).
Specifics:
- Fix a potential regression in the generic power domains framework
introduced during the 4.3 development cycle that may lead to
spurious failures of system suspend in certain situations (Ulf
Hansson).
- Fix a problem in the power capping RAPL (Running Average Power
Limits) driver that causes it to initialize successfully on some
systems where it is not supposed to do that which is due to an
incorrect check in an initialization routine (Prarit Bhargava).
- Fix a build problem in the cpufreq Tegra driver that depends on the
regulator framework, but that dependency is not reflected in
Kconfig (Arnd Bergmann).
- Fix a recent mistake in the intel_pstate driver where a numeric
constant is used directly instead of a symbol defined specifically
for the case in question (Prarit Bhargava)"
* tag 'pm+acpi-4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
powercap / RAPL: fix BIOS lock check
cpufreq: intel_pstate: Minor cleanup for FRAC_BITS
cpufreq: tegra: add regulator dependency for T124
PM / Domains: Allow runtime PM callbacks to be re-used during system PM
Three fixes this time, two in SES picked up by KASAN for various types of
buffer overrun. The first is a USB array which returns page 8 whatever is
asked for and causes us to overrun with incorrect data format assumptions and
the second is an invalid iteration of page 10 (the additional information
page). The final one is a reversion of a NULL deref fix which caused
suspend/resume not to be called in pairs leading to incorrect device operation
(Jens has queued a more proper fix for the problem in block).
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iQEcBAABAgAGBQJWdLxTAAoJEDeqqVYsXL0MwOYH+wYb27NxfyA7+q7z/dFz+LhQ
B9RlUfnEw57vVz7KEwleqJ9uA2jprCQndMqRoelmWtxeu5CVUBbq/1ONDWvPX2ha
Prr3wVp+SbqbtzmvGQrQ8If7o4iS47fXtwUe5RRDBdfKMUfXs7LeVBgQrpZsqlkE
va6LNKVqzYW4sneC+CfWcwwyedLGeaphNBYygKtCm7SfEkbnfH5+zhWH9JWwtYXf
r8VCCUnmF69ocx4a7MZLnSAJuXfzaJl45c0nhRiHTiokW7KYuylJm0Zd1PYkhwhV
rQr53otJsdPTyZUjmeCdS6PBlGp/HVdYIOyKt5b4Ti2S71ij9R52YPY6BdtIWeQ=
=6New
-----END PGP SIGNATURE-----
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Three fixes this time, two in SES picked up by KASAN for various types
of buffer overrun. The first is a USB array which returns page 8
whatever is asked for and causes us to overrun with incorrect data
format assumptions and the second is an invalid iteration of page 10
(the additional information page).
The final fix is a reversion of a NULL deref fix which caused
suspend/resume not to be called in pairs leading to incorrect device
operation (Jens has queued a more proper fix for the problem in
block)"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
ses: fix additional element traversal bug
Revert "SCSI: Fix NULL pointer dereference in runtime PM"
ses: Fix problems with simple enclosures
When sending "SLEEP" command to the controller it ceases scanning
completely and is unable to wake the system up from sleep, so if it is
configured as a wakeup source we should simply configure interrupt for
wakeup and rely on idle logic within the controller to reduce power
consumption while it is not used.
Signed-off-by: James Chen <james.chen@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Pull btrfs fixes from Chris Mason:
"A couple of small fixes"
* 'for-linus-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: check prepare_uptodate_page() error code earlier
Btrfs: check for empty bitmap list in setup_cluster_bitmaps
btrfs: fix misleading warning when space cache failed to load
Btrfs: fix transaction handle leak in balance
Btrfs: fix unprotected list move from unused_bgs to deleted_bgs list
Merge misc fixes from Andrew Morton:
"Three patches"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
include/linux/mmdebug.h: should include linux/bug.h
mm/zswap: change incorrect strncmp use to strcmp
proc: fix -ESRCH error when writing to /proc/$pid/coredump_filter
mmdebug.h uses BUILD_BUG_ON_INVALID(), assuming someone else included
linux/bug.h. Include it ourselves.
This saves build-failures such as:
arch/arm64/include/asm/pgtable.h: In function 'set_pte_at':
arch/arm64/include/asm/pgtable.h:281:3: error: implicit declaration of function 'BUILD_BUG_ON_INVALID' [-Werror=implicit-function-declaration]
VM_WARN_ONCE(!pte_young(pte),
Fixes: 02602a18c3 ("bug: completely remove code generated by disabled VM_BUG_ON()")
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change the use of strncmp in zswap_pool_find_get() to strcmp.
The use of strncmp is no longer correct, now that zswap_zpool_type is
not an array; sizeof() will return the size of a pointer, which isn't
the right length to compare. We don't need to use strncmp anyway,
because the existing params and the passed in params are all guaranteed
to be null terminated, so strcmp should be used.
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Reported-by: Weijie Yang <weijie.yang@samsung.com>
Cc: Seth Jennings <sjennings@variantweb.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Writing to /proc/$pid/coredump_filter always returns -ESRCH because commit
774636e19e ("proc: convert to kstrto*()/kstrto*_from_user()") removed
the setting of ret after the get_proc_task call and incorrectly left it as
-ESRCH. Instead, return 0 when successful.
Example breakage:
echo 0 > /proc/self/coredump_filter
bash: echo: write error: No such process
Fixes: 774636e19e ("proc: convert to kstrto*()/kstrto*_from_user()")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: <stable@vger.kernel.org> [4.3+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Select CONFIG_BITREVERSE for sht15 driver to avoid build failure
if it is not configured.
- Force wait for conversion time for the first valid data in tmp102
driver to avoid reporting erroneous data to the thermal subsystem.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=h83R
-----END PGP SIGNATURE-----
Merge tag 'hwmon-for-linus-v4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
- Select CONFIG_BITREVERSE for sht15 driver to avoid build failure if
it is not configured.
- Force wait for conversion time for the first valid data in tmp102
driver to avoid reporting erroneous data to the thermal subsystem.
* tag 'hwmon-for-linus-v4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (sht15) Select CONFIG_BITREVERSE
hwmon: (tmp102) Force wait for conversion time for the first valid data
* Two similar fixes for the Intel and AMD IOMMU drivers to add
proper access checks before calling handle_mm_fault.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)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=qrAB
-----END PGP SIGNATURE-----
Merge tag 'iommu-fixes-v4.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fixes from Joerg Roedel:
"Two similar fixes for the Intel and AMD IOMMU drivers to add proper
access checks before calling handle_mm_fault"
* tag 'iommu-fixes-v4.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/vt-d: Do access checks before calling handle_mm_fault()
iommu/amd: Do proper access checking before calling handle_mm_fault()
- XSA-155 security fixes to backend drivers.
- XSA-157 security fixes to pciback.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJWdDrXAAoJEFxbo/MsZsTR3N0H/0Lvz6MWBARCje7livbz7nqE
PS0Bea+2yAfNhCDDiDlpV0lor8qlyfWDF6lGhLjItldAzahag3ZDKDf1Z/lcQvhf
3MwFOcOVZE8lLtvLT6LGnPuehi1Mfdi1Qk1/zQhPhsq6+FLPLT2y+whmBihp8mMh
C12f7KRg5r3U7eZXNB6MEtGA0RFrOp0lBdvsiZx3qyVLpezj9mIe0NueQqwY3QCS
xQ0fILp/x2EnZNZuzgghFTPRxMAx5ReOezgn9Rzvq4aThD+irz1y6ghkYN4rG2s2
tyYOTqBnjJEJEQ+wmYMhnfCwVvDffztG+uI9hqN31QFJiNB0xsjSWFCkDAWchiU=
=Argz
-----END PGP SIGNATURE-----
Merge tag 'for-linus-4.4-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen bug fixes from David Vrabel:
- XSA-155 security fixes to backend drivers.
- XSA-157 security fixes to pciback.
* tag 'for-linus-4.4-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen-pciback: fix up cleanup path when alloc fails
xen/pciback: Don't allow MSI-X ops if PCI_COMMAND_MEMORY is not set.
xen/pciback: For XEN_PCI_OP_disable_msi[|x] only disable if device has MSI(X) enabled.
xen/pciback: Do not install an IRQ handler for MSI interrupts.
xen/pciback: Return error on XEN_PCI_OP_enable_msix when device has MSI or MSI-X enabled
xen/pciback: Return error on XEN_PCI_OP_enable_msi when device has MSI or MSI-X enabled
xen/pciback: Save xen_pci_op commands before processing it
xen-scsiback: safely copy requests
xen-blkback: read from indirect descriptors only once
xen-blkback: only read request operation from shared ring once
xen-netback: use RING_COPY_REQUEST() throughout
xen-netback: don't use last request to determine minimum Tx credit
xen: Add RING_COPY_REQUEST()
xen/x86/pvh: Use HVM's flush_tlb_others op
xen: Resume PMU from non-atomic context
xen/events/fifo: Consume unprocessed events when a CPU dies
As usual in rc6, this update contains only a few HD-audio and
USB-audio device-specific quirks: yet another Thinkpad noise fixes,
Dell headphone mic fixes, and AudioQuest DragonFly fixes.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=bf1H
-----END PGP SIGNATURE-----
Merge tag 'sound-4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"As usual in rc6, this update contains only a few HD-audio and
USB-audio device-specific quirks: yet another Thinkpad noise fixes,
Dell headphone mic fixes, and AudioQuest DragonFly fixes"
* tag 'sound-4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Add a fixup for Thinkpad X1 Carbon 2nd
ALSA: hda - Set codec to D3 at reboot/shutdown on Thinkpads
ALSA: hda - Apply click noise workaround for Thinkpads generically
ALSA: hda - Fix headphone mic input on a few Dell ALC293 machines
ALSA: usb-audio: Add sample rate inquiry quirk for AudioQuest DragonFly
ALSA: usb-audio: Add a more accurate volume quirk for AudioQuest DragonFly
A little bit of a last-minute change for the device tree "fixed partition"
binding. This is needed because we might want to reuse the 'partitions' subnode
for other sorts of partitioning descriptions -- e.g., for describing which
on-flash partition format(s) might be used on the system.
Also tone down a warning message, since it is probably going to show up on a
lot of systems where it should just be ignored.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=UcSG
-----END PGP SIGNATURE-----
Merge tag 'for-linus-20151217' of git://git.infradead.org/linux-mtd
Pull MTD fixes from Brian Norris:
"I was holding out on this pull request for a bit, since there are a
few other small issues being discussed that look like 4.4-rc
regressions. Hopefully I can get those stabilized soon, but these are
ready at any rate:
- A little bit of a last-minute change for the device tree "fixed
partition" binding. This is needed because we might want to reuse
the 'partitions' subnode for other sorts of partitioning
descriptions -- e.g., for describing which on-flash partition
format(s) might be used on the system.
- Also tone down a warning message, since it is probably going to
show up on a lot of systems where it should just be ignored"
* tag 'for-linus-20151217' of git://git.infradead.org/linux-mtd:
doc: dt: mtd: partitions: add compatible property to "partitions" node
mtd: ofpart: don't complain about missing 'partitions' node too loudly
Commit 8520f38099 ("USB: change hub initialization sleeps to
delayed_work") changed the hub_activate() routine to make part of it
run in a workqueue. However, the commit failed to take a reference to
the usb_hub structure or to lock the hub interface while doing so. As
a result, if a hub is plugged in and quickly unplugged before the work
routine can run, the routine will try to access memory that has been
deallocated. Or, if the hub is unplugged while the routine is
running, the memory may be deallocated while it is in active use.
This patch fixes the problem by taking a reference to the usb_hub at
the start of hub_activate() and releasing it at the end (when the work
is finished), and by locking the hub interface while the work routine
is running. It also adds a check at the start of the routine to see
if the hub has already been disconnected, in which nothing should be
done.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Alexandru Cornea <alexandru.cornea@intel.com>
Tested-by: Alexandru Cornea <alexandru.cornea@intel.com>
Fixes: 8520f38099 ("USB: change hub initialization sleeps to delayed_work")
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The code expects the loop to end with "retries" set to zero but, because
it is a post-op, it will end set to -1. I have fixed this by moving the
decrement inside the loop.
Fixes: 014aa2a3c3 ('USB: ipaq: minor ipaq_open() cleanup.')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Driver requested device firmware version string during probe using
only 24 byte long buffer. That buffer is too small for newer firmware
versions, which causes device firmware hang - device stops responding
to any commands after that. Increase buffer size to 128 which should
be enough for any current and future version strings.
Link: https://github.com/airspy/host/issues/27
Cc: <stable@vger.kernel.org> # 3.17+
Reported-by: Benjamin Vernoux <bvernoux@gmail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Used Avago MGA-81563 RF amplifier could be destroyed pretty easily
with too strong signal or transmitting to bad antenna.
Add module parameter 'enable_rf_gain_ctrl' which allows enabling
RF gain control - otherwise, default without the module parameter,
RF gain control is set to 'grabbed' state which prevents setting
value to the control.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
drivers/media/usb/hackrf/hackrf.c:1533 hackrf_probe()
error: we previously assumed 'dev' could be null (see line 1366)
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
When allocating a pciback device fails, clear the private
field. This could lead to an use-after free, however
the 'really_probe' takes care of setting
dev_set_drvdata(dev, NULL) in its failure path (which we would
exercise if the ->probe function failed), so we we
are OK. However lets be defensive as the code can change.
Going forward we should clean up the pci_set_drvdata(dev, NULL)
in the various code-base. That will be for another day.
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reported-by: Jonathan Creekmore <jonathan.creekmore@gmail.com>
Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
If CONFIG_BITREVERSE is not built-in, the sht15 driver fails to link:
drivers/built-in.o: In function `sht15_crc8':
drivers/hwmon/sht15.c:195: undefined reference to `byte_rev_table'
This adds a Kconfig 'select' statement, like all other users of
bitrev.h have it.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 33836ee985 ("hwmon:change sht15_reverse()")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
commit f598282f51 ("PCI: Fix the NIU MSI-X problem in a better way")
teaches us that dealing with MSI-X can be troublesome.
Further checks in the MSI-X architecture shows that if the
PCI_COMMAND_MEMORY bit is turned of in the PCI_COMMAND we
may not be able to access the BAR (since they are memory regions).
Since the MSI-X tables are located in there.. that can lead
to us causing PCIe errors. Inhibit us performing any
operation on the MSI-X unless the MEMORY bit is set.
Note that Xen hypervisor with:
"x86/MSI-X: access MSI-X table only after having enabled MSI-X"
will return:
xen_pciback: 0000:0a:00.1: error -6 enabling MSI-X for guest 3!
When the generic MSI code tries to setup the PIRQ without
MEMORY bit set. Which means with later versions of Xen
(4.6) this patch is not neccessary.
This is part of XSA-157
CC: stable@vger.kernel.org
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Otherwise just continue on, returning the same values as
previously (return of 0, and op->result has the PIRQ value).
This does not change the behavior of XEN_PCI_OP_disable_msi[|x].
The pci_disable_msi or pci_disable_msix have the checks for
msi_enabled or msix_enabled so they will error out immediately.
However the guest can still call these operations and cause
us to disable the 'ack_intr'. That means the backend IRQ handler
for the legacy interrupt will not respond to interrupts anymore.
This will lead to (if the device is causing an interrupt storm)
for the Linux generic code to disable the interrupt line.
Naturally this will only happen if the device in question
is plugged in on the motherboard on shared level interrupt GSI.
This is part of XSA-157
CC: stable@vger.kernel.org
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Otherwise an guest can subvert the generic MSI code to trigger
an BUG_ON condition during MSI interrupt freeing:
for (i = 0; i < entry->nvec_used; i++)
BUG_ON(irq_has_action(entry->irq + i));
Xen PCI backed installs an IRQ handler (request_irq) for
the dev->irq whenever the guest writes PCI_COMMAND_MEMORY
(or PCI_COMMAND_IO) to the PCI_COMMAND register. This is
done in case the device has legacy interrupts the GSI line
is shared by the backend devices.
To subvert the backend the guest needs to make the backend
to change the dev->irq from the GSI to the MSI interrupt line,
make the backend allocate an interrupt handler, and then command
the backend to free the MSI interrupt and hit the BUG_ON.
Since the backend only calls 'request_irq' when the guest
writes to the PCI_COMMAND register the guest needs to call
XEN_PCI_OP_enable_msi before any other operation. This will
cause the generic MSI code to setup an MSI entry and
populate dev->irq with the new PIRQ value.
Then the guest can write to PCI_COMMAND PCI_COMMAND_MEMORY
and cause the backend to setup an IRQ handler for dev->irq
(which instead of the GSI value has the MSI pirq). See
'xen_pcibk_control_isr'.
Then the guest disables the MSI: XEN_PCI_OP_disable_msi
which ends up triggering the BUG_ON condition in 'free_msi_irqs'
as there is an IRQ handler for the entry->irq (dev->irq).
Note that this cannot be done using MSI-X as the generic
code does not over-write dev->irq with the MSI-X PIRQ values.
The patch inhibits setting up the IRQ handler if MSI or
MSI-X (for symmetry reasons) code had been called successfully.
P.S.
Xen PCIBack when it sets up the device for the guest consumption
ends up writting 0 to the PCI_COMMAND (see xen_pcibk_reset_device).
XSA-120 addendum patch removed that - however when upstreaming said
addendum we found that it caused issues with qemu upstream. That
has now been fixed in qemu upstream.
This is part of XSA-157
CC: stable@vger.kernel.org
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The guest sequence of:
a) XEN_PCI_OP_enable_msix
b) XEN_PCI_OP_enable_msix
results in hitting an NULL pointer due to using freed pointers.
The device passed in the guest MUST have MSI-X capability.
The a) constructs and SysFS representation of MSI and MSI groups.
The b) adds a second set of them but adding in to SysFS fails (duplicate entry).
'populate_msi_sysfs' frees the newly allocated msi_irq_groups (note that
in a) pdev->msi_irq_groups is still set) and also free's ALL of the
MSI-X entries of the device (the ones allocated in step a) and b)).
The unwind code: 'free_msi_irqs' deletes all the entries and tries to
delete the pdev->msi_irq_groups (which hasn't been set to NULL).
However the pointers in the SysFS are already freed and we hit an
NULL pointer further on when 'strlen' is attempted on a freed pointer.
The patch adds a simple check in the XEN_PCI_OP_enable_msix to guard
against that. The check for msi_enabled is not stricly neccessary.
This is part of XSA-157
CC: stable@vger.kernel.org
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The guest sequence of:
a) XEN_PCI_OP_enable_msi
b) XEN_PCI_OP_enable_msi
c) XEN_PCI_OP_disable_msi
results in hitting an BUG_ON condition in the msi.c code.
The MSI code uses an dev->msi_list to which it adds MSI entries.
Under the above conditions an BUG_ON() can be hit. The device
passed in the guest MUST have MSI capability.
The a) adds the entry to the dev->msi_list and sets msi_enabled.
The b) adds a second entry but adding in to SysFS fails (duplicate entry)
and deletes all of the entries from msi_list and returns (with msi_enabled
is still set). c) pci_disable_msi passes the msi_enabled checks and hits:
BUG_ON(list_empty(dev_to_msi_list(&dev->dev)));
and blows up.
The patch adds a simple check in the XEN_PCI_OP_enable_msi to guard
against that. The check for msix_enabled is not stricly neccessary.
This is part of XSA-157.
CC: stable@vger.kernel.org
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Double fetch vulnerabilities that happen when a variable is
fetched twice from shared memory but a security check is only
performed the first time.
The xen_pcibk_do_op function performs a switch statements on the op->cmd
value which is stored in shared memory. Interestingly this can result
in a double fetch vulnerability depending on the performed compiler
optimization.
This patch fixes it by saving the xen_pci_op command before
processing it. We also use 'barrier' to make sure that the
compiler does not perform any optimization.
This is part of XSA155.
CC: stable@vger.kernel.org
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The copy of the ring request was lacking a following barrier(),
potentially allowing the compiler to optimize the copy away.
Use RING_COPY_REQUEST() to ensure the request is copied to local
memory.
This is part of XSA155.
CC: stable@vger.kernel.org
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
David Sterba