diff --git a/block/genhd.c b/block/genhd.c
index be5bab20b2abf278fd7d7370c1a082de0928b1ed..2c9d1f5207c287b3fd80331103384b9c0706901c 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -637,10 +637,12 @@ static void register_disk(struct device *parent, struct gendisk *disk)
 		kobject_uevent(&part_to_dev(part)->kobj, KOBJ_ADD);
 	disk_part_iter_exit(&piter);
 
-	err = sysfs_create_link(&ddev->kobj,
-				&disk->queue->backing_dev_info->dev->kobj,
-				"bdi");
-	WARN_ON(err);
+	if (disk->queue->backing_dev_info->dev) {
+		err = sysfs_create_link(&ddev->kobj,
+			  &disk->queue->backing_dev_info->dev->kobj,
+			  "bdi");
+		WARN_ON(err);
+	}
 }
 
 /**