Merge remote-tracking branch 'lsk/v3.10/topic/big.LITTLE' into linux-linaro-lsk

[firefly-linux-kernel-4.4.55.git] / drivers / md / md.c

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 2290b95009de3f57b89a5a22053751f3e869a23c..963fa59be9b31ac25f2e5471d85ae372e5b890a8 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1118,6 +1118,7 @@ static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev)
        rdev->raid_disk = -1;
        clear_bit(Faulty, &rdev->flags);
        clear_bit(In_sync, &rdev->flags);
+       clear_bit(Bitmap_sync, &rdev->flags);
        clear_bit(WriteMostly, &rdev->flags);
 
        if (mddev->raid_disks == 0) {
@@ -1196,6 +1197,8 @@ static int super_90_validate(struct mddev *mddev, struct md_rdev *rdev)
                 */
                if (ev1 < mddev->bitmap->events_cleared)
                        return 0;
+               if (ev1 < mddev->events)
+                       set_bit(Bitmap_sync, &rdev->flags);
        } else {
                if (ev1 < mddev->events)
                        /* just a hot-add of a new device, leave raid_disk at -1 */
@@ -1604,6 +1607,7 @@ static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev)
        rdev->raid_disk = -1;
        clear_bit(Faulty, &rdev->flags);
        clear_bit(In_sync, &rdev->flags);
+       clear_bit(Bitmap_sync, &rdev->flags);
        clear_bit(WriteMostly, &rdev->flags);
 
        if (mddev->raid_disks == 0) {
@@ -1686,6 +1690,8 @@ static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev)
                 */
                if (ev1 < mddev->bitmap->events_cleared)
                        return 0;
+               if (ev1 < mddev->events)
+                       set_bit(Bitmap_sync, &rdev->flags);
        } else {
                if (ev1 < mddev->events)
                        /* just a hot-add of a new device, leave raid_disk at -1 */
@@ -2829,6 +2835,7 @@ slot_store(struct md_rdev *rdev, const char *buf, size_t len)
                else
                        rdev->saved_raid_disk = -1;
                clear_bit(In_sync, &rdev->flags);
+               clear_bit(Bitmap_sync, &rdev->flags);
                err = rdev->mddev->pers->
                        hot_add_disk(rdev->mddev, rdev);
                if (err) {
@@ -5761,6 +5768,7 @@ static int add_new_disk(struct mddev * mddev, mdu_disk_info_t *info)
                            info->raid_disk < mddev->raid_disks) {
                                rdev->raid_disk = info->raid_disk;
                                set_bit(In_sync, &rdev->flags);
+                               clear_bit(Bitmap_sync, &rdev->flags);
                        } else
                                rdev->raid_disk = -1;
                } else
@@ -7330,8 +7338,10 @@ void md_do_sync(struct md_thread *thread)
        /* just incase thread restarts... */
        if (test_bit(MD_RECOVERY_DONE, &mddev->recovery))
                return;
-       if (mddev->ro) /* never try to sync a read-only array */
+       if (mddev->ro) {/* never try to sync a read-only array */
+               set_bit(MD_RECOVERY_INTR, &mddev->recovery);
                return;
+       }
 
        if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) {
                if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery))
@@ -7694,7 +7704,8 @@ static int remove_and_add_spares(struct mddev *mddev,
                if (test_bit(Faulty, &rdev->flags))
                        continue;
                if (mddev->ro &&
-                   rdev->saved_raid_disk < 0)
+                   ! (rdev->saved_raid_disk >= 0 &&
+                      !test_bit(Bitmap_sync, &rdev->flags)))
                        continue;
 
                rdev->recovery_offset = 0;
@@ -7775,9 +7786,13 @@ void md_check_recovery(struct mddev *mddev)
                         * As we only add devices that are already in-sync,
                         * we can activate the spares immediately.
                         */
-                       clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
                        remove_and_add_spares(mddev, NULL);
-                       mddev->pers->spare_active(mddev);
+                       /* There is no thread, but we need to call
+                        * ->spare_active and clear saved_raid_disk
+                        */
+                       set_bit(MD_RECOVERY_INTR, &mddev->recovery);
+                       md_reap_sync_thread(mddev);
+                       clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
                        goto unlock;
                }
 
@@ -8469,7 +8484,8 @@ static int md_notify_reboot(struct notifier_block *this,
                if (mddev_trylock(mddev)) {
                        if (mddev->pers)
                                __md_stop_writes(mddev);
-                       mddev->safemode = 2;
+                       if (mddev->persistent)
+                               mddev->safemode = 2;
                        mddev_unlock(mddev);
                }
                need_delay = 1;