3 files changed, 26 insertions, 0 deletions

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 09d32db06d20..41df4cda66e2 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1451,6 +1451,29 @@ static void bitmap_set_memory_bits(struct bitmap *bitmap, sector_t offset)
 }
 
 /*
+ * flush out any pending updates
+ */
+void bitmap_flush(mddev_t *mddev)
+{
+        struct bitmap *bitmap = mddev->bitmap;
+        int sleep;
+
+        if (!bitmap) /* there was no bitmap */
+                return;
+
+        /* run the daemon_work three time to ensure everything is flushed
+         * that can be
+         */
+        sleep = bitmap->daemon_sleep;
+        bitmap->daemon_sleep = 0;
+        bitmap_daemon_work(bitmap);
+        bitmap_daemon_work(bitmap);
+        bitmap_daemon_work(bitmap);
+        bitmap->daemon_sleep = sleep;
+        bitmap_update_sb(bitmap);
+}
+
+/*
  * free memory that was allocated
  */
 void bitmap_destroy(mddev_t *mddev)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 9fd4dbea0d0d..480f658db6f2 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);
diff --git a/include/linux/raid/bitmap.h b/include/linux/raid/bitmap.h
index 6213e976eade..4bf1659f8aa8 100644
--- a/include/linux/raid/bitmap.h
+++ b/include/linux/raid/bitmap.h
@@ -248,6 +248,7 @@ struct bitmap {
 
 /* these are used only by md/bitmap */
 int  bitmap_create(mddev_t *mddev);
+void bitmap_flush(mddev_t *mddev);
 void bitmap_destroy(mddev_t *mddev);
 int  bitmap_active(struct bitmap *bitmap);