diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
index 6b84c3413e83..ad74e87be92d 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -2153,13 +2153,15 @@ static int em28xx_v4l2_open(struct file *filp)
 		return -EINVAL;
 	}
 
+	if (mutex_lock_interruptible(&dev->lock))
+		return -ERESTARTSYS;
+	if (dev->v4l2 == NULL)
+		return -ENOMEM;
+
 	em28xx_videodbg("open dev=%s type=%s users=%d\n",
 			video_device_node_name(vdev), v4l2_type_names[fh_type],
 			v4l2->users);
 
-	if (mutex_lock_interruptible(&dev->lock))
-		return -ERESTARTSYS;
-
 	ret = v4l2_fh_open(filp);
 	if (ret) {
 		dev_err(&dev->intf->dev,