md: Using poll /proc/mdstat can monitor the events of adding a spare disks

Signed-off-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 9160463..734bc09 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5274,6 +5274,8 @@ static int add_new_disk(mddev_t * mddev, mdu_disk_info_t *info)
                if (mddev->degraded)
                        set_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
                set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+               if (!err)
+                       md_new_event(mddev);
                md_wakeup_thread(mddev->thread);
                return err;
        }