[media] em28xx: unregister devices in case of failure

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>

diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
index 52428b4cce5fca468beabca9c8670f6a801041de..8c87f3fbd0cf3cc41c8e6eebb3485f24b4e0ad78 100644 (file)
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -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: