Commit Graph

856835 Commits

Author SHA1 Message Date
Anssi Hannula 3486cc40cc can: xilinx_can: xcan_chip_start(): fix failure with invalid bus
Currently the xilinx_can xcan_chip_start() function, called from
.ndo_open() and via CAN_MODE_START (bus-off restart), waits for the SR
register to show the wanted operating state, with a 1 sec timeout.

However, that register bit will only be set once the HW has observed 11
consecutive recessive bits (BusIdle) on the bus.

If the bus will not see the 11 bits (e.g. it is stuck dominant), the
function will timeout and return an error. If this was done as part of a
scheduled restart from bus-off, the interface will stay in bus-off state
forever even if the bus recovers later.

According to M_CAN and FLEXCAN documentation they also wait for 11
consecutive recessive bits, but their drivers do not seem to wait for
that.

To make the behavior consistent, modify xilinx_can to also not wait for
the synchronization to complete.

The only way for users to know for sure that the bus has been joined
successfully is to see successfully received or transmitted frames. That
does not seem optimal, but it is consistent with other drivers and we
should have a properly working restart-ms with xilinx_can.

Tested on ZynqMP with Xilinx CAN-FD 1.0.

Fixes: b1201e44f5 ("can: xilinx CAN controller support")
Signed-off-by: Anssi Hannula <anssi.hannula@bitwise.fi>
Tested-by: Appana Durga Kedareswara Rao <appana.durga.rao@xilinx.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2019-08-13 16:42:05 +02:00
YueHaibing 7123e1c7ea can: ti_hecc: ti_hecc_mailbox_read(): remove set but not used variable 'mbx_mask'
Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/can/ti_hecc.c: In function 'ti_hecc_mailbox_read':
drivers/net/can/ti_hecc.c:533:12: warning:
 variable 'mbx_mask' set but not used [-Wunused-but-set-variable]

It is never used so can be removed.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2019-08-13 16:40:29 +02:00
Marc Kleine-Budde babfcda6ef can: ti_hecc: ti_hecc_mailbox_read(): add blank lines to improve readability
This patch adds two blank lines in ti_hecc_mailbox_read() to improve the
readability of the function.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2019-08-13 16:37:04 +02:00
Marc Kleine-Budde c71400cec4 can: ti_hecc: ti_hecc_start(): avoid multiple assignments
This patch changes the multiple assignments of HECC_TX_MASK in
ti_hecc_start() into two single ones.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2019-08-13 16:37:04 +02:00
Marc Kleine-Budde dfa9352dbe can: ti_hecc: fix print formating strings
This patch fixes the print format strings in the driver.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2019-08-13 16:37:04 +02:00
Marc Kleine-Budde ab3a78f659 can: ti_hecc: avoid long lines
This patch fixes long lines in the driver.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2019-08-13 16:37:04 +02:00
Marc Kleine-Budde d5f1a984ed can: ti_hecc: fix indention
This patch fixes the indention in the driver.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2019-08-13 16:37:03 +02:00
Marc Kleine-Budde 99a3d7c122 can: ti_hecc: convert block comments to network style comments
This patch converts all block comments to network subsystem style block
comments.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2019-08-13 16:37:03 +02:00
YueHaibing 175a60b73b can: sja1000: f81601: remove unused including <linux/version.h>
Remove including <linux/version.h> that don't need it.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2019-08-13 16:37:03 +02:00
YueHaibing 5549369cfd can: kvaser_pciefd: Remove unused including <linux/version.h>
Remove including <linux/version.h> that don't need it.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2019-08-13 16:37:03 +02:00
Christer Beskow 1910cd8853 can: kvaser_pciefd: kvaser_pciefd_pwm_stop(): remove unnecessary code when setting pwm duty cycle to zero
To set the duty cycle to zero (i.e. pwm_stop), the trigger value shall
be equal to the top value.

This is achieved by reading the value of the top bit field from the pwm
register and then writing back this value to the trigger and top bit
fields.

Addresses-Coverity: ("Logically dead code")
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Christer Beskow <chbe@kvaser.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2019-08-13 16:36:52 +02:00
Greg Kroah-Hartman 53f6f39178 caif: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Richard Fontana <rfontana@redhat.com>
Cc: Steve Winslow <swinslow@gmail.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:31:25 -07:00
Greg Kroah-Hartman 6f20a697e4 xen-netback: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Wei Liu <wei.liu@kernel.org>
Cc: Paul Durrant <paul.durrant@citrix.com>
Cc: xen-devel@lists.xenproject.org
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:30:06 -07:00
David S. Miller a858390177 Merge branch 'net-dsa-mv88e6xxx-prepare-Wait-Bit-operation'
Vivien Didelot says:

====================
net: dsa: mv88e6xxx: prepare Wait Bit operation

The Remote Management Interface has its own implementation of a Wait
Bit operation, which requires a bit number and a value to wait for.

In order to prepare the introduction of this implementation, rework the
code waiting for bits and masks in mv88e6xxx to match this signature.

This has the benefit to unify the implementation of wait routines while
removing obsolete wait and update functions and also reducing the code.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:27:15 -07:00
Vivien Didelot eede236112 net: dsa: mv88e6xxx: add delay in direct SMI wait
The mv88e6xxx_smi_direct_wait routine is used to wait on indirect
registers access. It is of no exception and must delay between read
attempts, like other wait routines.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:27:15 -07:00
Vivien Didelot 1c6463b6fc net: dsa: mv88e6xxx: fix SMI bit checking
The current mv88e6xxx_smi_direct_wait function is only used to check
the 16th bit of the (16-bit) SMI Command register. But the bit shift
operation is not enough if we eventually use this function to check
other bits, thus replace it with a mask.

Fixes: e7ba0fad9c ("net: dsa: mv88e6xxx: refine SMI support")
Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:27:15 -07:00
Vivien Didelot 2ad4da776b net: dsa: mv88e6xxx: remove wait and update routines
Now that we have proper Wait Bit and Wait Mask routines, remove the
unused mv88e6xxx_wait routine and its Global 1 and Global 2 variants.

The indirect tables such as the Device Mapping Table or Priority
Override Table make use of an Update bit to distinguish reading (0)
from writing (1) operations. After a write operation occurs, the bit
self clears right away so there's no need to wait on it. Thus keep
things simple and remove the mv88e6xxx_update helper as well.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:27:15 -07:00
Vivien Didelot 28ae1e9662 net: dsa: mv88e6xxx: wait for AVB Busy bit
The AVB is not an indirect table using an Update bit, but a unit using
a Busy bit. This means that we must ensure that this bit is cleared
before setting it and wait until it gets cleared again after writing
an operation. Reflect that.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:27:15 -07:00
Vivien Didelot 19fb7f69da net: dsa: mv88e6xxx: introduce wait bit routine
Many portions of the driver need to wait until a given bit is set
or cleared. Some busses even have a specific implementation for this
operation. In preparation for such variant, implement a generic Wait
Bit routine that can be used by the driver core functions.

This allows us to get rid of the custom implementations we may find
in the driver. Note that for the EEPROM bits, BUSY and RUNNING bits
are independent, thus it is more efficient to wait independently for
each bit instead of waiting for their mask.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:27:15 -07:00
Vivien Didelot 683f2244c5 net: dsa: mv88e6xxx: introduce wait mask routine
The current mv88e6xxx_wait routine is used to wait for a given mask
to be cleared to zero. However in some cases, the driver may have
to wait for a given mask to be of a certain non-zero value.

Thus provide a generic wait mask routine that will be used to implement
the current mv88e6xxx_wait function, and use it to wait for 88E6185
PPU states.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:27:15 -07:00
Vivien Didelot 929938536f net: dsa: mv88e6xxx: wait for 88E6185 PPU disabled
The PPU state of 88E6185 can be either "Disabled at Reset" or
"Disabled after Initialization". Because we intentionally clear the
PPU Enabled bit before checking its state, it is safe to wait for the
MV88E6185_G1_STS_PPU_STATE_DISABLED state explicitly instead of waiting
for any state different than MV88E6185_G1_STS_PPU_STATE_POLLING.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:27:15 -07:00
Heiner Kallweit eb2e7f0922 r8169: inline rtl8169_free_rx_databuff
rtl8169_free_rx_databuff is used in only one place, so let's inline it.
We can improve the loop because rtl8169_init_ring zero's RX_databuff
before calling rtl8169_rx_fill, and rtl8169_rx_fill fills
Rx_databuff starting from index 0.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:25:30 -07:00
David S. Miller d35bbe84c1 Merge branch 'realtek-phy-next'
Heiner Kallweit says:

====================
net: phy: realtek: add support for integrated 2.5Gbps PHY in RTL8125

This series adds support for the integrated 2.5Gbps PHY in RTL8125.
First three patches add necessary functionality to phylib.

Changes in v2:
- added patch 1
- changed patch 4 to use a fake PHY ID that is injected by the
  network driver. This allows to use a dedicated PHY driver.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:24:32 -07:00
Heiner Kallweit 087f5b8758 net: phy: realtek: add support for the 2.5Gbps PHY in RTL8125
This adds support for the integrated 2.5Gbps PHY in Realtek RTL8125.
Advertisement of 2.5Gbps mode is done via a vendor-specific register.
Same applies to reading NBase-T link partner advertisement.
Unfortunately this 2.5Gbps PHY shares the PHY ID with the integrated
1Gbps PHY's in other Realtek network chips and so far no method is
known to differentiate them. As a workaround use a dedicated fake PHY ID
that is set by the network driver by intercepting the MDIO PHY ID read.

v2:
- Create dedicated PHY driver and use a fake PHY ID that is injected by
  the network driver. Suggested by Andrew Lunn.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:24:32 -07:00
Heiner Kallweit bf22b343ca net: phy: add phy_modify_paged_changed
Add helper function phy_modify_paged_changed, behavios is the same
as for phy_modify_changed.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:24:32 -07:00
Heiner Kallweit f4069cd7fa net: phy: prepare phylib to deal with PHY's extending Clause 22
The integrated PHY in 2.5Gbps chip RTL8125 is the first (known to me)
PHY that uses standard Clause 22 for all modes up to 1Gbps and adds
2.5Gbps control using vendor-specific registers. To use phylib for
the standard part little extensions are needed:
- Move most of genphy_config_aneg to a new function
  __genphy_config_aneg that takes a parameter whether restarting
  auto-negotiation is needed (depending on whether content of
  vendor-specific advertisement register changed).
- Don't clear phydev->lp_advertising in genphy_read_status so that
  we can set non-C22 mode flags before.

Basically both changes mimic the behavior of the equivalent Clause 45
functions.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:24:32 -07:00
Heiner Kallweit 3eef868932 net: phy: simplify genphy_config_advert by using the linkmode_adv_to_xxx_t functions
Using linkmode_adv_to_mii_adv_t and linkmode_adv_to_mii_ctrl1000_t
allows to simplify the code. In addition avoiding the conversion to
the legacy u32 advertisement format allows to remove the warning.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:24:32 -07:00
Jiri Pirko 150e8f8a1b netdevsim: register couple of devlink params
Register couple of devlink params, one generic, one driver-specific.
Make the values available over debugfs.

Example:
$ echo "111" > /sys/bus/netdevsim/new_device
$ devlink dev param
netdevsim/netdevsim111:
  name max_macs type generic
    values:
      cmode driverinit value 32
  name test1 type driver-specific
    values:
      cmode driverinit value true
$ cat /sys/kernel/debug/netdevsim/netdevsim111/max_macs
32
$ cat /sys/kernel/debug/netdevsim/netdevsim111/test1
Y
$ devlink dev param set netdevsim/netdevsim111 name max_macs cmode driverinit value 16
$ devlink dev param set netdevsim/netdevsim111 name test1 cmode driverinit value false
$ devlink dev reload netdevsim/netdevsim111
$ cat /sys/kernel/debug/netdevsim/netdevsim111/max_macs
16
$ cat /sys/kernel/debug/netdevsim/netdevsim111/test1

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:20:25 -07:00
David S. Miller 6e5ee48339 Merge branch 'drop_monitor-Capture-dropped-packets-and-metadata'
Ido Schimmel says:

====================
drop_monitor: Capture dropped packets and metadata

So far drop monitor supported only one mode of operation in which a
summary of recent packet drops is periodically sent to user space as a
netlink event. The event only includes the drop location (program
counter) and number of drops in the last interval.

While this mode of operation allows one to understand if the system is
dropping packets, it is not sufficient if a more detailed analysis is
required. Both the packet itself and related metadata are missing.

This patchset extends drop monitor with another mode of operation where
the packet - potentially truncated - and metadata (e.g., drop location,
timestamp, netdev) are sent to user space as a netlink event. Thanks to
the extensible nature of netlink, more metadata can be added in the
future.

To avoid performing expensive operations in the context in which
kfree_skb() is called, the dropped skbs are cloned and queued on per-CPU
skb drop list. The list is then processed in process context (using a
workqueue), where the netlink messages are allocated, prepared and
finally sent to user space.

A follow-up patchset will integrate drop monitor with devlink and allow
the latter to call into drop monitor to report hardware drops. In the
future, XDP drops can be added as well, thereby making drop monitor the
go-to netlink channel for diagnosing all packet drops.

Example usage with patched dropwatch [1] can be found here [2]. Example
dissection of drop monitor netlink events with patched wireshark [3] can
be found here [4]. I will submit both changes upstream after the kernel
changes are accepted. Another change worth making is adding a dropmon
pseudo interface to libpcap, similar to the nflog interface [5]. This
will allow users to specifically listen on dropmon traffic instead of
capturing all netlink packets via the nlmon netdev.

Patches #1-#5 prepare the code towards the actual changes in later
patches.

Patch #6 adds another mode of operation to drop monitor in which the
dropped packet itself is notified to user space along with metadata.

Patch #7 allows users to truncate reported packets to a specific length,
in case only the headers are of interest. The original length of the
packet is added as metadata to the netlink notification.

Patch #8 allows user to query the current configuration of drop monitor
(e.g., alert mode, truncation length).

Patches #9-#10 allow users to tune the length of the per-CPU skb drop
list according to their needs.

Changes since v1 [6]:
* Add skb protocol as metadata. This allows user space to correctly
  dissect the packet instead of blindly assuming it is an Ethernet
  packet

Changes since RFC [7]:
* Limit the length of the per-CPU skb drop list and make it configurable
* Do not use the hysteresis timer in packet alert mode
* Introduce alert mode operations in a separate patch and only then
  introduce the new alert mode
* Use 'skb->skb_iif' instead of 'skb->dev' because the latter is inside
  a union with 'dev_scratch' and therefore not guaranteed to point to a
  valid netdev
* Return '-EBUSY' instead of '-EOPNOTSUPP' when trying to configure drop
  monitor while it is monitoring
* Did not change schedule_work() in favor of schedule_work_on() as I did
  not observe a change in number of tail drops

[1] https://github.com/idosch/dropwatch/tree/packet-mode
[2] https://gist.github.com/idosch/3d524b887e16bc11b4b19e25c23dcc23#file-gistfile1-txt
[3] https://github.com/idosch/wireshark/tree/drop-monitor-v2
[4] https://gist.github.com/idosch/3d524b887e16bc11b4b19e25c23dcc23#file-gistfile2-txt
[5] https://github.com/the-tcpdump-group/libpcap/blob/master/pcap-netfilter-linux.c
[6] https://patchwork.ozlabs.org/cover/1143443/
[7] https://patchwork.ozlabs.org/cover/1135226/
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 10:53:31 -07:00
Ido Schimmel e9feb58020 drop_monitor: Expose tail drop counter
Previous patch made the length of the per-CPU skb drop list
configurable. Expose a counter that shows how many packets could not be
enqueued to this list.

This allows users determine the desired queue length.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 10:53:30 -07:00
Ido Schimmel 30328d46af drop_monitor: Make drop queue length configurable
In packet alert mode, each CPU holds a list of dropped skbs that need to
be processed in process context and sent to user space. To avoid
exhausting the system's memory the maximum length of this queue is
currently set to 1000.

Allow users to tune the length of this queue according to their needs.
The configured length is reported to user space when drop monitor
configuration is queried.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 10:53:30 -07:00
Ido Schimmel 444be061d0 drop_monitor: Add a command to query current configuration
Users should be able to query the current configuration of drop monitor
before they start using it. Add a command to query the existing
configuration which currently consists of alert mode and packet
truncation length.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 10:53:30 -07:00
Ido Schimmel 57986617a7 drop_monitor: Allow truncation of dropped packets
When sending dropped packets to user space it is not always necessary to
copy the entire packet as usually only the headers are of interest.

Allow user to specify the truncation length and add the original length
of the packet as additional metadata to the netlink message.

By default no truncation is performed.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 10:53:30 -07:00
Ido Schimmel ca30707dee drop_monitor: Add packet alert mode
So far drop monitor supported only one alert mode in which a summary of
locations in which packets were recently dropped was sent to user space.

This alert mode is sufficient in order to understand that packets were
dropped, but lacks information to perform a more detailed analysis.

Add a new alert mode in which the dropped packet itself is passed to
user space along with metadata: The drop location (as program counter
and resolved symbol), ingress netdevice and drop timestamp. More
metadata can be added in the future.

To avoid performing expensive operations in the context in which
kfree_skb() is invoked (can be hard IRQ), the dropped skb is cloned and
queued on per-CPU skb drop list. Then, in process context the netlink
message is allocated, prepared and finally sent to user space.

The per-CPU skb drop list is limited to 1000 skbs to prevent exhausting
the system's memory. Subsequent patches will make this limit
configurable and also add a counter that indicates how many skbs were
tail dropped.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 10:53:30 -07:00
Ido Schimmel 28315f7999 drop_monitor: Add alert mode operations
The next patch is going to add another alert mode in which the dropped
packet is notified to user space, instead of only a summary of recent
drops.

Abstract the differences between the modes by adding alert mode
operations. The operations are selected based on the currently
configured mode and associated with the probes and the work item just
before tracing starts.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 10:53:30 -07:00
Ido Schimmel c5ab9b1c41 drop_monitor: Require CAP_NET_ADMIN for drop monitor configuration
Currently, the configure command does not do anything but return an
error. Subsequent patches will enable the command to change various
configuration options such as alert mode and packet truncation.

Similar to other netlink-based configuration channels, make sure only
users with the CAP_NET_ADMIN capability set can execute this command.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 10:53:30 -07:00
Ido Schimmel 44075f5637 drop_monitor: Reset per-CPU data before starting to trace
The function reset_per_cpu_data() allocates and prepares a new skb for
the summary netlink alert message ('NET_DM_CMD_ALERT'). The new skb is
stored in the per-CPU 'data' variable and the old is returned.

The function is invoked during module initialization and from the
workqueue, before an alert is sent. This means that it is possible to
receive an alert with stale data, if we stopped tracing when the
hysteresis timer ('data->send_timer') was pending.

Instead of invoking the function during module initialization, invoke it
just before we start tracing and ensure we get a fresh skb.

This also allows us to remove the calls to initialize the timer and the
work item from the module initialization path, since both could have
been triggered by the error paths of reset_per_cpu_data().

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 10:53:30 -07:00
Ido Schimmel 70c69274f3 drop_monitor: Initialize timer and work item upon tracing enable
The timer and work item are currently initialized once during module
init, but subsequent patches will need to associate different functions
with the work item, based on the configured alert mode.

Allow subsequent patches to make that change by initializing and
de-initializing these objects during tracing enable and disable.

This also guarantees that once the request to disable tracing returns,
no more netlink notifications will be generated.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 10:53:30 -07:00
Ido Schimmel 7c747838a5 drop_monitor: Split tracing enable / disable to different functions
Subsequent patches will need to enable / disable tracing based on the
configured alerting mode.

Reduce the nesting level and prepare for the introduction of this
functionality by splitting the tracing enable / disable operations into
two different functions.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 10:53:30 -07:00
David S. Miller 2cc2743d8f Merge branch 'Networking-driver-debugfs-cleanups'
Greg Kroah-Hartman says:

====================
Networking driver debugfs cleanups

There is no need to test the result of any debugfs call anymore.  The
debugfs core warns the user if something fails, and the return value of
a debugfs call can always be fed back into another debugfs call with no
problems.

Also, debugfs is for debugging, so if there are problems with debugfs
(i.e. the system is out of memory) the rest of the kernel should not
change behavior, so testing for debugfs calls is pointless and not the
goal of debugfs at all.

This series cleans up a lot of networking drivers and some wimax code
that was calling debugfs and trying to do something with the return
value that it didn't need to.  Removing this logic makes the code
smaller, easier to understand, and use less run-time memory in some
cases, all good things.

The series is against net-next, and have no dependancies between any of
them if they want to go through any random tree/order.  Or, if wanted,
I can take them through my driver-core tree where other debugfs cleanups
are being slowly fed during major merge windows.

v3: fix build warning in i2400m, I thought I had caught them all :(
    add acks from some reviewers

v2: fix up build warnings, it's as if I never even built these.  Ugh, so
    sorry for wasting people's time with the v1 series.  I need to stop
    relying on 0-day as it isn't working well anymore :(
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-10 15:25:49 -07:00
Greg Kroah-Hartman 7e174a49bb ieee802154: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Alexander Aring <alex.aring@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Harry Morris <h.morris@cascoda.com>
Cc: linux-wpan@vger.kernel.org
Cc: netdev@vger.kernel.org
Acked-by: Stefan Schmidt <stefan@datenfreihafen.org>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-10 15:25:48 -07:00
Greg Kroah-Hartman 35dc61ebfc ixgbe: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: intel-wired-lan@lists.osuosl.org
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-10 15:25:48 -07:00
Greg Kroah-Hartman 43c4eb0381 i40e: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: intel-wired-lan@lists.osuosl.org
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-10 15:25:48 -07:00
Greg Kroah-Hartman ecc5570751 fm10k: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: intel-wired-lan@lists.osuosl.org
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-10 15:25:48 -07:00
Greg Kroah-Hartman e6882aa623 mvpp2: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Maxime Chevallier <maxime.chevallier@bootlin.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Nathan Huckleberry <nhuck@google.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-10 15:25:48 -07:00
Greg Kroah-Hartman 2f62f8e6c3 skge: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Mirko Lindner <mlindner@marvell.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-10 15:25:48 -07:00
Greg Kroah-Hartman 687236b07a qca: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Michael Heimpold <michael.heimpold@i2se.com>
Cc: Yangtao Li <tiny.windzz@gmail.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-10 15:25:48 -07:00
Greg Kroah-Hartman 92aff5b467 dpaa2: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Because we don't care about the individual files, we can remove the
stored dentry for the files, as they are not needed to be kept track of
at all.

Cc: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-10 15:25:48 -07:00
Greg Kroah-Hartman 8d72ab119f stmmac: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Because we don't care about the individual files, we can remove the
stored dentry for the files, as they are not needed to be kept track of
at all.

Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: netdev@vger.kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-10 15:25:48 -07:00
Greg Kroah-Hartman 16e9b481e9 nfp: no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jesper Dangaard Brouer <hawk@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Edwin Peer <edwin.peer@netronome.com>
Cc: Yangtao Li <tiny.windzz@gmail.com>
Cc: Simon Horman <simon.horman@netronome.com>
Cc: oss-drivers@netronome.com
Cc: netdev@vger.kernel.org
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-10 15:25:48 -07:00