V4L/DVB (8613): v4l: move BKL down to the driver level.

The BKL is now moved from the video_open function in v4l2-dev.c to the
various drivers. It seems about a third of the drivers already has a
lock of some sort protecting the open(), another third uses
video_exclusive_open (yuck!) and the last third required adding the
BKL in their open function.

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

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/media/video/stradis.c b/drivers/media/video/stradis.c
index 276bded06ab3..a3cbe9be3c15 100644
--- a/drivers/media/video/stradis.c
+++ b/drivers/media/video/stradis.c
@@ -1882,12 +1882,16 @@ static int saa_open(struct inode *inode, struct file *file)
         struct video_device *vdev = video_devdata(file);
         struct saa7146 *saa = container_of(vdev, struct saa7146, video_dev);
 
+        lock_kernel();
         file->private_data = saa;
 
         saa->user++;
-        if (saa->user > 1)
+        if (saa->user > 1) {
+                unlock_kernel();
                 return 0;       /* device open already, don't reset */
+        }
         saa->writemode = VID_WRITE_MPEG_VID;    /* default to video */
+        unlock_kernel();
         return 0;
 }