From: Andrew Morton <akpm@linux-foundation.org>

If this mutex_lock_interruptible() does fail due to signal_pending() then the
state of the driver will get trashed in interesting ways, because userspace
cannot and will not retry the close().

Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/media/dvb/cinergyT2/cinergyT2.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff -puN drivers/media/dvb/cinergyT2/cinergyT2.c~cinergyt2-fix-file-release-handler drivers/media/dvb/cinergyT2/cinergyT2.c
--- a/drivers/media/dvb/cinergyT2/cinergyT2.c~cinergyt2-fix-file-release-handler
+++ a/drivers/media/dvb/cinergyT2/cinergyT2.c
@@ -519,8 +519,7 @@ static int cinergyt2_release (struct ino
 	struct dvb_device *dvbdev = file->private_data;
 	struct cinergyt2 *cinergyt2 = dvbdev->priv;
 
-	if (mutex_lock_interruptible(&cinergyt2->sem))
-		return -ERESTARTSYS;
+	mutex_lock(&cinergyt2->sem);
 
 	if (!cinergyt2->disconnect_pending && (file->f_flags & O_ACCMODE) != O_RDONLY) {
 		cancel_delayed_work(&cinergyt2->query_work);
_