[PATCH] md: make sure recovery happens when add_new_disk is used for hot_add

Currently if add_new_disk is used to hot-add a drive to a degraded array,
recovery doesn't start ...  because we didn't tell it to.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index d899204d3743..60835dfd058e 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2083,6 +2083,8 @@ static int add_new_disk(mddev_t * mddev, mdu_disk_info_t *info)
                 err = bind_rdev_to_array(rdev, mddev);
                 if (err)
                         export_rdev(rdev);
+
+                set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
                 if (mddev->thread)
                         md_wakeup_thread(mddev->thread);
                 return err;