diff --git a/block/ioctl.c b/block/ioctl.c
index 9cfa2e1..309760b 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -72,7 +72,7 @@
 			bdevp = bdget_disk(disk, part);
 			if (!bdevp)
 				return -ENOMEM;
-			mutex_lock(&bdevp->bd_mutex);
+			mutex_lock_nested(&bdevp->bd_mutex, BD_MUTEX_PARTITION);
 			if (bdevp->bd_openers) {
 				mutex_unlock(&bdevp->bd_mutex);
 				bdput(bdevp);
@@ -82,7 +82,7 @@
 			fsync_bdev(bdevp);
 			invalidate_bdev(bdevp, 0);
 
-			mutex_lock(&bdev->bd_mutex);
+			mutex_lock_nested(&bdev->bd_mutex, BD_MUTEX_WHOLE);
 			delete_partition(disk, part);
 			mutex_unlock(&bdev->bd_mutex);
 			mutex_unlock(&bdevp->bd_mutex);