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, 7 insertions, 1 deletions

diff --git a/drivers/media/video/saa5249.c b/drivers/media/video/saa5249.c
index 0d63973..96c0fdf 100644
--- a/drivers/media/video/saa5249.c
+++ b/drivers/media/video/saa5249.c
@@ -52,6 +52,7 @@
 #include <linux/ioport.h>
 #include <linux/slab.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 #include <stdarg.h>
 #include <linux/i2c.h>
 #include <linux/videotext.h>
@@ -633,9 +634,12 @@ static int saa5249_open(struct inode *inode, struct file *file)
 	struct saa5249_device *t=vd->priv;
 	int err,pgbuf;
 
+	lock_kernel();
 	err = video_exclusive_open(inode,file);
-	if (err < 0)
+	if (err < 0) {
+		unlock_kernel();
 		return err;
+	}
 
 	if (t->client==NULL) {
 		err = -ENODEV;
@@ -664,10 +668,12 @@ static int saa5249_open(struct inode *inode, struct file *file)
 		t->is_searching[pgbuf] = false;
 	}
 	t->virtual_mode = false;
+	unlock_kernel();
 	return 0;
 
  fail:
 	video_exclusive_release(inode,file);
+	unlock_kernel();
 	return err;
 }