V4L/DVB (8857): v4l2-dev: replace panic with BUG

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

drivers/media/video/v4l2-dev.c

@@ -91,8 +91,11 @@ static void v4l2_chardev_release(struct kobject *kobj)
 	struct video_device *vfd = container_of(kobj, struct video_device, cdev.kobj);
 
 	mutex_lock(&videodev_lock);
-	if (video_device[vfd->minor] != vfd)
-		panic("videodev: bad release");
+	if (video_device[vfd->minor] != vfd) {
+		mutex_unlock(&videodev_lock);
+		BUG();
+		return;
+	}
 
 	/* Free up this device for reuse */
 	video_device[vfd->minor] = NULL;