diff --git a/block/genhd.c b/block/genhd.c
index 68065189ca17..a1d9e785dcf7 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -530,6 +530,7 @@ out_unregister_queue:
 	rq_qos_exit(disk->queue);
 out_put_slave_dir:
 	kobject_put(disk->slave_dir);
+	disk->slave_dir = NULL;
 out_put_holder_dir:
 	kobject_put(disk->part0->bd_holder_dir);
 out_del_integrity:
@@ -624,6 +625,7 @@ void del_gendisk(struct gendisk *disk)
 
 	kobject_put(disk->part0->bd_holder_dir);
 	kobject_put(disk->slave_dir);
+	disk->slave_dir = NULL;
 
 	part_stat_set_all(disk->part0, 0);
 	disk->part0->bd_stamp = 0;