Merge tag 'md-6.13-20241107' of https://git.kernel.org/pub/scm/linux/…

…kernel/git/song/md into for-6.13/block

Pull raid5 fix from Song.

* tag 'md-6.13-20241107' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
  MAINTAINERS: Make Yu Kuai co-maintainer of md/raid subsystem
  md/raid5: Wait sync io to finish before changing group cnt

MAINTAINERS

@@ -21303,7 +21303,7 @@ F:	include/linux/property.h
 
 SOFTWARE RAID (Multiple Disks) SUPPORT
 M:	Song Liu <song@kernel.org>
-R:	Yu Kuai <yukuai3@huawei.com>
+M:	Yu Kuai <yukuai3@huawei.com>
 L:	linux-raid@vger.kernel.org
 S:	Supported
 Q:	https://patchwork.kernel.org/project/linux-raid/list/

drivers/md/raid5.c

@@ -7176,6 +7176,8 @@ raid5_store_group_thread_cnt(struct mddev *mddev, const char *page, size_t len)
 	err = mddev_suspend_and_lock(mddev);
 	if (err)
 		return err;
+	raid5_quiesce(mddev, true);
+
 	conf = mddev->private;
 	if (!conf)
 		err = -ENODEV;
@@ -7197,6 +7199,8 @@ raid5_store_group_thread_cnt(struct mddev *mddev, const char *page, size_t len)
 			kfree(old_groups);
 		}
 	}
+
+	raid5_quiesce(mddev, false);
 	mddev_unlock_and_resume(mddev);
 
 	return err ?: len;