[PATCH] 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>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/media/video/em28xx/em28xx-video.c

@@ -367,6 +367,9 @@ 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)