If a process is interrupted while accessing the radio device and the core lock is contended, release() could return early and fail to update the interrupt mask.
Note that the return value of the v4l2 release file operation is ignored.
Fixes: 87d1a50ce451 ("[media] V4L2: WL1273 FM Radio: TI WL1273 FM radio driver") Cc: stable stable@vger.kernel.org # 2.6.38 Cc: Matti Aaltonen matti.j.aaltonen@nokia.com Cc: Mauro Carvalho Chehab mchehab@redhat.com Signed-off-by: Johan Hovold johan@kernel.org --- drivers/media/radio/radio-wl1273.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/media/radio/radio-wl1273.c b/drivers/media/radio/radio-wl1273.c index 104ac41c6f96..112376873167 100644 --- a/drivers/media/radio/radio-wl1273.c +++ b/drivers/media/radio/radio-wl1273.c @@ -1148,8 +1148,7 @@ static int wl1273_fm_fops_release(struct file *file) if (radio->rds_users > 0) { radio->rds_users--; if (radio->rds_users == 0) { - if (mutex_lock_interruptible(&core->lock)) - return -EINTR; + mutex_lock(&core->lock);
radio->irq_flags &= ~WL1273_RDS_EVENT;