1 files changed, 11 insertions, 6 deletions

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 86cb7e5d83d5..787022c18187 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -668,7 +668,14 @@ static int super_load(struct md_rdev *rdev, struct md_rdev *refdev)
                 return ret;
 
         sb = page_address(rdev->sb_page);
-        if (sb->magic != cpu_to_le32(DM_RAID_MAGIC)) {
+
+        /*
+         * Two cases that we want to write new superblocks and rebuild:
+         * 1) New device (no matching magic number)
+         * 2) Device specified for rebuild (!In_sync w/ offset == 0)
+         */
+        if ((sb->magic != cpu_to_le32(DM_RAID_MAGIC)) ||
+            (!test_bit(In_sync, &rdev->flags) && !rdev->recovery_offset)) {
                 super_sync(rdev->mddev, rdev);
 
                 set_bit(FirstUse, &rdev->flags);
@@ -745,11 +752,8 @@ static int super_init_validation(struct mddev *mddev, struct md_rdev *rdev)
          */
         rdev_for_each(r, t, mddev) {
                 if (!test_bit(In_sync, &r->flags)) {
-                        if (!test_bit(FirstUse, &r->flags))
-                                DMERR("Superblock area of "
-                                      "rebuild device %d should have been "
-                                      "cleared.", r->raid_disk);
-                        set_bit(FirstUse, &r->flags);
+                        DMINFO("Device %d specified for rebuild: "
+                               "Clearing superblock", r->raid_disk);
                         rebuilds++;
                 } else if (test_bit(FirstUse, &r->flags))
                         new_devs++;
@@ -971,6 +975,7 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
 
         INIT_WORK(&rs->md.event_work, do_table_event);
         ti->private = rs;
+        ti->num_flush_requests = 1;
 
         mutex_lock(&rs->md.reconfig_mutex);
         ret = md_run(&rs->md);