V4L/DVB: uvcvideo: Check uvc_ctrl_begin return value in VIDIOC_S_CTRL

The function return value wasn't checked due to a missing variable
assignment.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
index bf1fc7f29ca78912ebc347fb74762019c1549be4..43152aa522271763ca831edf15671bb6efac3b59 100644 (file)
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ b/drivers/media/video/uvc/uvc_v4l2.c
@@ -539,7 +539,7 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
                xctrl.id = ctrl->id;
                xctrl.value = ctrl->value;
 
-               uvc_ctrl_begin(chain);
+               ret = uvc_ctrl_begin(chain);
                if (ret < 0)
                        return ret;