tree 922c9e4476283fb1eb346c12bd9b0ee8be556a8a
parent 9bb24a7e49c33c16c4d9d7d3496f46626e573d02
author Alexey Khoroshilov <khoroshilov@ispras.ru> 1331064509 -0300
committer Mauro Carvalho Chehab <mchehab@redhat.com> 1332178584 -0300

[media] dib9000: implement error handling for DibAcquireLock

DibAcquireLock() is implemented as mutex_lock_interruptible()
but the driver does not handle unsuccessful locking.
As a result it may lead to unlock of an unheld mutex.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>