[PATCH] md: make sure md bitmap updates are flushed when array is stopped.

The recent change to never ignore the bitmap, revealed that the bitmap isn't
begin flushed properly when an array is stopped.

We call bitmap_daemon_work three times as there is a three-stage pipeline for
flushing updates to the bitmap file.

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 9fd4dbea0d0..480f658db6f 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1798,6 +1798,8 @@ static int do_md_stop(mddev_t * mddev, int ro)
                                 goto out;
                         mddev->ro = 1;
                 } else {
+                        bitmap_flush(mddev);
+                        wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0);
                         if (mddev->ro)
                                 set_disk_ro(disk, 0);
                         blk_queue_make_request(mddev->queue, md_fail_request);