can: Explicitly include correct DT includes

The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that mer

can: Explicitly include correct DT includes

The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/all/20230714174757.4060748-1-robh@kernel.org
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: grcan: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error ha

can: grcan: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart from
emitting a warning) and this typically results in resource leaks. To improve
here there is a quest to make the remove callback return void. In the first
step of this quest all drivers are converted to .remove_new() which already
returns void. Eventually after all drivers are converted, .remove_new() is
renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230512212725.143824-9-u.kleine-koenig@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: dev: fix skb drop check

In commit a6d190f8c767 ("can: skb: drop tx skb if in listen only
mode") the priv->ctrlmode element is read even on virtual CAN
interfaces that do not create the struct c

can: dev: fix skb drop check

In commit a6d190f8c767 ("can: skb: drop tx skb if in listen only
mode") the priv->ctrlmode element is read even on virtual CAN
interfaces that do not create the struct can_priv at startup. This
out-of-bounds read may lead to CAN frame drops for virtual CAN
interfaces like vcan and vxcan.

This patch mainly reverts the original commit and adds a new helper
for CAN interface drivers that provide the required information in
struct can_priv.

Fixes: a6d190f8c767 ("can: skb: drop tx skb if in listen only mode")
Reported-by: Dariusz Stojaczyk <Dariusz.Stojaczyk@opensynergy.com>
Cc: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Cc: Max Staudt <max@enpas.org>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Acked-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20221102095431.36831-1-socketcan@hartkopp.net
Cc: stable@vger.kernel.org # 6.0.x
[mkl: patch pch_can, too]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: tree-wide: advertise software timestamping capabilities

Currently, some CAN drivers support hardware timestamping, some do
not. But userland has no method to query which features are supported

can: tree-wide: advertise software timestamping capabilities

Currently, some CAN drivers support hardware timestamping, some do
not. But userland has no method to query which features are supported
(aside maybe of getting RX messages and observe whether or not
hardware timestamps stay at zero).

The canonical way for a network driver to advertised what kind of
timestamping it supports is to implement ethtool_ops::get_ts_info().

This patch only targets the CAN drivers which *do not* support
hardware timestamping. For each of those CAN drivers, implement the
get_ts_info() using the generic ethtool_op_get_ts_info().

This way, userland can do:

| $ ethtool --show-time-stamping canX

to confirm the device timestamping capacities.

N.B. the drivers which support hardware timestamping will be migrated
in separate patches.

Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20220727101641.198847-6-mailhol.vincent@wanadoo.fr
[mkl: mscan: add missing mscan_ethtool_ops]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: add CAN_ERR_CNT flag to notify availability of error counter

Add a dedicated flag in uapi/linux/can/error.h to notify the userland
that fields data[6] and data[7] of the CAN error frame were
re

can: add CAN_ERR_CNT flag to notify availability of error counter

Add a dedicated flag in uapi/linux/can/error.h to notify the userland
that fields data[6] and data[7] of the CAN error frame were
respectively populated with the tx and rx error counters.

For all driver tree-wide, set up this flags whenever needed.

Link: https://lore.kernel.org/all/20220719143550.3681-12-mailhol.vincent@wanadoo.fr
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link:

can: grcan: grcan_probe(): remove extra of_node_get()

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: can-dev: move to netif_napi_add_weight()

We want to remove the weight argument from the basic version of the
netif_napi_add() call. Move all the callers in drivers/net/can that
pass a custom we

can: can-dev: move to netif_napi_add_weight()

We want to remove the weight argument from the basic version of the
netif_napi_add() call. Move all the callers in drivers/net/can that
pass a custom weight (i.e. not NAPI_POLL_WEIGHT or 64) to the
netif_napi_add_weight() API.

Link: https://lore.kernel.org/all/20220517002345.1812104-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: grcan: only use the NAPI poll budget for RX

The previous split budget between TX and RX made it return not using
the entire budget but at the same time not having calling called
napi_complete.

can: grcan: only use the NAPI poll budget for RX

The previous split budget between TX and RX made it return not using
the entire budget but at the same time not having calling called
napi_complete. This sometimes led to the poll to not be called, and at
the same time having TX and RX interrupts disabled resulting in the
driver getting stuck.

Fixes: 6cec9b07fe6a ("can: grcan: Add device driver for GRCAN and GRHCAN cores")
Link: https://lore.kernel.org/all/20220429084656.29788-4-andreas@gaisler.com
Cc: stable@vger.kernel.org
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: grcan: grcan_probe(): fix broken system id check for errata workaround needs

The systemid property was checked for in the wrong place of the device
tree and compared to the wrong value.

Fixes:

can: grcan: grcan_probe(): fix broken system id check for errata workaround needs

The systemid property was checked for in the wrong place of the device
tree and compared to the wrong value.

Fixes: 6cec9b07fe6a ("can: grcan: Add device driver for GRCAN and GRHCAN cores")
Link: https://lore.kernel.org/all/20220429084656.29788-3-andreas@gaisler.com
Cc: stable@vger.kernel.org
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: grcan: use ofdev->dev when allocating DMA memory

Use the device of the device tree node should be rather than the
device of the struct net_device when allocating DMA buffers.

The driver got aw

can: grcan: use ofdev->dev when allocating DMA memory

Use the device of the device tree node should be rather than the
device of the struct net_device when allocating DMA buffers.

The driver got away with it on sparc32 until commit 53b7670e5735
("sparc: factor the dma coherent mapping into helper") after which the
driver oopses.

Fixes: 6cec9b07fe6a ("can: grcan: Add device driver for GRCAN and GRHCAN cores")
Link: https://lore.kernel.org/all/20220429084656.29788-2-andreas@gaisler.com
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: grcan: grcan_close(): fix deadlock

There are deadlocks caused by del_timer_sync(&priv->hang_timer) and
del_timer_sync(&priv->rr_timer) in grcan_close(), one of the deadlocks
are shown below:

can: grcan: grcan_close(): fix deadlock

There are deadlocks caused by del_timer_sync(&priv->hang_timer) and
del_timer_sync(&priv->rr_timer) in grcan_close(), one of the deadlocks
are shown below:

(Thread 1) | (Thread 2)
| grcan_reset_timer()
grcan_close() | mod_timer()
spin_lock_irqsave() //(1) | (wait a time)
... | grcan_initiate_running_reset()
del_timer_sync() | spin_lock_irqsave() //(2)
(wait timer to stop) | ...

We hold priv->lock in position (1) of thread 1 and use
del_timer_sync() to wait timer to stop, but timer handler also need
priv->lock in position (2) of thread 2. As a result, grcan_close()
will block forever.

This patch extracts del_timer_sync() from the protection of
spin_lock_irqsave(), which could let timer handler to obtain the
needed lock.

Link: https://lore.kernel.org/all/20220425042400.66517-1-duoming@zju.edu.cn
Fixes: 6cec9b07fe6a ("can: grcan: Add device driver for GRCAN and GRHCAN cores")
Cc: stable@vger.kernel.org
Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
Reviewed-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: do not increase tx_bytes statistics for RTR frames

The actual payload length of the CAN Remote Transmission Request (RTR)
frames is always 0, i.e. no payload is transmitted on the wire.
However

can: do not increase tx_bytes statistics for RTR frames

The actual payload length of the CAN Remote Transmission Request (RTR)
frames is always 0, i.e. no payload is transmitted on the wire.
However, those RTR frames still use the DLC to indicate the length of
the requested frame.

As such, net_device_stats::tx_bytes should not be increased when
sending RTR frames.

The function can_get_echo_skb() already returns the correct length,
even for RTR frames (c.f. [1]). However, for historical reasons, the
drivers do not use can_get_echo_skb()'s return value and instead, most
of them store a temporary length (or dlc) in some local structure or
array. Using the return value of can_get_echo_skb() solves the
issue. After doing this, such length/dlc fields become unused and so
this patch does the adequate cleaning when needed.

This patch fixes all the CAN drivers.

Finally, can_get_echo_skb() is decorated with the __must_check
attribute in order to force future drivers to correctly use its return
value (else the compiler would emit a warning).

[1] commit ed3320cec279 ("can: dev: __can_get_echo_skb():
fix real payload length return value for RTR frames")

Link: https://lore.kernel.org/all/20211207121531.42941-6-mailhol.vincent@wanadoo.fr
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: Yasushi SHOJI <yashi@spacecubics.com>
Cc: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: Stephane Grosjean <s.grosjean@peak-system.com>
Cc: Andreas Larsson <andreas@gaisler.com>
Tested-by: Jimmy Assarsson <extja@kvaser.com> # kvaser
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Acked-by: Stefan Mätje <stefan.maetje@esd.eu> # esd_usb2
Tested-by: Stefan Mätje <stefan.maetje@esd.eu> # esd_usb2
[mkl: add conversion for grcan]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: do not increase rx_bytes statistics for RTR frames

The actual payload length of the CAN Remote Transmission Request (RTR)
frames is always 0, i.e. no payload is transmitted on the wire.
However

can: do not increase rx_bytes statistics for RTR frames

The actual payload length of the CAN Remote Transmission Request (RTR)
frames is always 0, i.e. no payload is transmitted on the wire.
However, those RTR frames still use the DLC to indicate the length of
the requested frame.

As such, net_device_stats::rx_bytes should not be increased for the
RTR frames.

This patch fixes all the CAN drivers.

Link: https://lore.kernel.org/all/20211207121531.42941-5-mailhol.vincent@wanadoo.fr
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Chandrasekar Ramakrishnan <rcsekar@samsung.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: Yasushi SHOJI <yashi@spacecubics.com>
Cc: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com>
Cc: Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Stephane Grosjean <s.grosjean@peak-system.com>
Tested-by: Jimmy Assarsson <extja@kvaser.com> # kvaser
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Acked-by: Stefan Mätje <stefan.maetje@esd.eu> # esd_usb2
Tested-by: Stefan Mätje <stefan.maetje@esd.eu> # esd_usb2
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is

can: grcan: grcan_probe(): remove extra of_node_get()

commit 562fed945ea482833667f85496eeda766d511386 upstream.

In grcan_probe(), of_find_node_by_path() has already increased the
refcount. There is no need to call of_node_get() again, so remove it.

Link: https://lore.kernel.org/all/20220619070257.4067022-1-windhl@126.com
Fixes: 1e93ed26acf0 ("can: grcan: grcan_probe(): fix broken system id check for errata workaround needs")
Cc: stable@vger.kernel.org # v5.18
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...