diff --git a/block/blk-core.c b/block/blk-core.c
index b9e857f4afe85fcc1b19d00064e62e743c1c977f..1086dac8724c995b85bf3c843a4aae080ab938a1 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -578,7 +578,6 @@ void blk_cleanup_queue(struct request_queue *q)
 		q->queue_lock = &q->__queue_lock;
 	spin_unlock_irq(lock);
 
-	bdi_unregister(q->backing_dev_info);
 	put_disk_devt(q->disk_devt);
 
 	/* @q is and will stay empty, shutdown and put */
diff --git a/block/genhd.c b/block/genhd.c
index 2f444b87a5f244db1bd65fea29eea1daae265c1a..b26a5ea115d00b51f20c8e59f09a420b2dbadc9f 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -681,6 +681,11 @@ void del_gendisk(struct gendisk *disk)
 	disk->flags &= ~GENHD_FL_UP;
 
 	sysfs_remove_link(&disk_to_dev(disk)->kobj, "bdi");
+	/*
+	 * Unregister bdi before releasing device numbers (as they can get
+	 * reused and we'd get clashes in sysfs).
+	 */
+	bdi_unregister(disk->queue->backing_dev_info);
 	blk_unregister_queue(disk);
 	blk_unregister_region(disk_devt(disk), disk->minors);