Stefan Agner 8a5d1e374b can: mcp251x: fix resume when device is down ...

commit 25b401c181 upstream.

If a valid power regulator or a dummy regulator is used (which
happens to be the case when no regulator is specified), restart_work
is queued no matter whether the device was running or not at suspend
time. Since work queues get initialized in the ndo_open callback,
resuming leads to a NULL pointer exception.

Reverse exactly the steps executed at suspend time:
- Enable the power regulator in any case
- Enable the transceiver regulator if the device was running, even in
  case we have a power regulator
- Queue restart_work only in case the device was running

Fixes: bf66f3736a ("can: mcp251x: Move to threaded interrupts instead of workqueues.")
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2015-08-10 12:21:51 -07:00

..

Kconfig

can: move SPI drivers into a separate directory

2014-04-24 22:54:16 +02:00

Makefile

net: can: use kbuild magic to inherit debug settings

2014-08-18 01:03:38 +02:00

mcp251x.c

can: mcp251x: fix resume when device is down

2015-08-10 12:21:51 -07:00