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media: radio: wl1273: fix interrupt masking on release

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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: 87d1a50ce4 ("[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>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Johan Hovold 2019-10-10 10:13:32 -03:00 committed by Mauro Carvalho Chehab
parent 11609a7e21
commit 1091eb8306
1 changed files with 1 additions and 2 deletions
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3
drivers/media/radio/radio-wl1273.c
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@ -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;