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, 6 insertions, 1 deletions

diff --git a/drivers/media/video/meye.c b/drivers/media/video/meye.c
index a9ef7802eb5f..cdaff2fdf394 100644
--- a/drivers/media/video/meye.c
+++ b/drivers/media/video/meye.c
@@ -845,15 +845,19 @@ static int meye_open(struct inode *inode, struct file *file)
 {
         int i, err;
 
+        lock_kernel();
         err = video_exclusive_open(inode, file);
-        if (err < 0)
+        if (err < 0) {
+                unlock_kernel();
                 return err;
+        }
 
         mchip_hic_stop();
 
         if (mchip_dma_alloc()) {
                 printk(KERN_ERR "meye: mchip framebuffer allocation failed\n");
                 video_exclusive_release(inode, file);
+                unlock_kernel();
                 return -ENOBUFS;
         }
 
@@ -861,6 +865,7 @@ static int meye_open(struct inode *inode, struct file *file)
                 meye.grab_buffer[i].state = MEYE_BUF_UNUSED;
         kfifo_reset(meye.grabq);
         kfifo_reset(meye.doneq);
+        unlock_kernel();
         return 0;
 }