diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 31b208fb225e..44bea3f65060 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -561,8 +561,8 @@ int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr)
 	list_for_each_entry_safe(dev, next, &tr->devs, list)
 		tr->remove_dev(dev);
 
-	unregister_blkdev(tr->major, tr->name);
 	mutex_unlock(&mtd_table_mutex);
+	unregister_blkdev(tr->major, tr->name);
 
 	BUG_ON(!list_empty(&tr->devs));
 	return 0;