--- x/block/bdev.c
+++ y/block/bdev.c
@@ -1137,12 +1137,12 @@ void bdev_release(struct file *bdev_file
 	 * from userland - e.g. eject(1).
 	 */
 	disk_flush_events(disk, DISK_EVENT_MEDIA_CHANGE);
+	mutex_unlock(&disk->open_mutex);
 
 	if (bdev_is_partition(bdev))
 		blkdev_put_part(bdev);
 	else
 		blkdev_put_whole(bdev);
-	mutex_unlock(&disk->open_mutex);
 
 	module_put(disk->fops->owner);
 put_no_open: