V4L/DVB (3314): Fixed em28xx based system lockup

Fixed em28xx based system lockup, device needs to be initialized
before starting the isoc transfer otherwise the system will completly lock up.

Signed-off-by: Markus Rechberger <mrechberger@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index 1726b2c26b6c..1c1557d9bace 100644
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/drivers/media/video/em28xx/em28xx-video.c
@@ -383,12 +383,14 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
                 em28xx_capture_start(dev, 1);
                 em28xx_resolution_set(dev);
 
+                /* device needs to be initialized before isoc transfer */
+                video_mux(dev, 0);
+
                 /* start the transfer */
                 errCode = em28xx_init_isoc(dev);
                 if (errCode)
                         goto err;
 
-                video_mux(dev, 0);
         }
 
         dev->users++;