V4L/DVB (5699): Cinergyt2: fix file release handler

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().

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/media/dvb/cinergyT2/cinergyT2.c b/drivers/media/dvb/cinergyT2/cinergyT2.c
index 34d7abc900d7..6aba5b39ed14 100644
--- a/drivers/media/dvb/cinergyT2/cinergyT2.c
+++ b/drivers/media/dvb/cinergyT2/cinergyT2.c
@@ -519,8 +519,7 @@ static int cinergyt2_release (struct inode *inode, struct file *file)
         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);