1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 32fc19c540d4..1379b1a3b9ff 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -8592,7 +8592,7 @@ static int __init md_init(void)
                 goto err_mdp;
         mdp_major = ret;
 
-        blk_register_region(MKDEV(MD_MAJOR, 0), 1UL<<MINORBITS, THIS_MODULE,
+        blk_register_region(MKDEV(MD_MAJOR, 0), 512, THIS_MODULE,
                             md_probe, NULL, NULL);
         blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE,
                             md_probe, NULL, NULL);
@@ -8687,7 +8687,7 @@ static __exit void md_exit(void)
         struct list_head *tmp;
         int delay = 1;
 
-        blk_unregister_region(MKDEV(MD_MAJOR,0), 1U << MINORBITS);
+        blk_unregister_region(MKDEV(MD_MAJOR,0), 512);
         blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS);
 
         unregister_blkdev(MD_MAJOR,"md");