]> git.baikalelectronics.ru Git - kernel.git/commit
fbcon: fix workqueue shutdown
authorGeoff Levand <geoffrey.levand@am.sony.com>
Tue, 9 Dec 2008 21:14:17 +0000 (13:14 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 10 Dec 2008 16:01:53 +0000 (08:01 -0800)
commitedb3587a9333d35d8067413a3f94e21ccd799693
tree943e23ab29434d1e9ebb3abfa4441cf9ea3d73f0
parenta25ede20bb12e1d2e2ad438dcab521da3b40c0b5
fbcon: fix workqueue shutdown

Add a call to cancel_work_sync() in fbcon_exit() to cancel any pending
work in the fbcon workqueue.

The current implementation of fbcon_exit() sets the fbcon workqueue
function info->queue.func to NULL, but does not assure that there is no
work pending when it does so.  On occasion, depending on system timing,
there will still be pending work in the queue when fbcon_exit() is
called.  This results in a null pointer deference when run_workqueue()
tries to call the queue's work function.

Fixes errors on shutdown similar to these:

  Console: switching to colour dummy device 80x25
  Unable to handle kernel paging request for data at address 0x00000000

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/video/console/fbcon.c