[media] em28xx: unregister devices in case of failure
authorMauro Carvalho Chehab <mchehab@osg.samsung.com>
Fri, 29 Jan 2016 15:08:19 +0000 (13:08 -0200)
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>
Mon, 1 Feb 2016 09:26:50 +0000 (07:26 -0200)
If something bad happens during device registration, unregister
the already registered devices.

Without that, it will have lots of KASAN errors when udev
would try to open the devices.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
drivers/media/usb/em28xx/em28xx-video.c

index 52428b4..8c87f3f 100644 (file)
@@ -2579,6 +2579,22 @@ static int em28xx_v4l2_init(struct em28xx *dev)
        return 0;
 
 unregister_dev:
+       if (video_is_registered(&v4l2->radio_dev)) {
+               em28xx_info("V4L2 device %s deregistered\n",
+                           video_device_node_name(&v4l2->radio_dev));
+               video_unregister_device(&v4l2->radio_dev);
+       }
+       if (video_is_registered(&v4l2->vbi_dev)) {
+               em28xx_info("V4L2 device %s deregistered\n",
+                           video_device_node_name(&v4l2->vbi_dev));
+               video_unregister_device(&v4l2->vbi_dev);
+       }
+       if (video_is_registered(&v4l2->vdev)) {
+               em28xx_info("V4L2 device %s deregistered\n",
+                           video_device_node_name(&v4l2->vdev));
+               video_unregister_device(&v4l2->vdev);
+       }
+
        v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
        v4l2_device_unregister(&v4l2->v4l2_dev);
 err: