V4L/DVB (8505): saa7134-empress.c: fix deadlock

ts_release() locked a mutex that videobuf_stop() also tried to obtain.
But ts_release() shouldn't hold that mutex at all.

Make empress_users atomic as well to prevent possible race condition.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/media/video/saa7134/saa7134.h b/drivers/media/video/saa7134/saa7134.h
index ade4e19799e9..ed20dd56379c 100644
--- a/drivers/media/video/saa7134/saa7134.h
+++ b/drivers/media/video/saa7134/saa7134.h
@@ -561,7 +561,7 @@ struct saa7134_dev {
         /* SAA7134_MPEG_EMPRESS only */
         struct video_device        *empress_dev;
         struct videobuf_queue      empress_tsq;
-        unsigned int               empress_users;
+        atomic_t                   empress_users;
         struct work_struct         empress_workqueue;
         int                        empress_started;