[PATCH] md: set the unplug_fn and issue_flush_fn for md devices *after* committed to creation

We we set the too early, they may still be in place and possibly get called
even though the array didn't get set up properly.

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>
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index e9dc287..3c37be6 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1639,9 +1639,6 @@
 			mdname(mddev));
 		goto out_free_conf;
 	}
-	mddev->queue->unplug_fn = raid10_unplug;
-
-	mddev->queue->issue_flush_fn = raid10_issue_flush;
 
 	ITERATE_RDEV(mddev, rdev, tmp) {
 		disk_idx = rdev->raid_disk;
@@ -1713,6 +1710,9 @@
 	mddev->array_size = size/2;
 	mddev->resync_max_sectors = size;
 
+	mddev->queue->unplug_fn = raid10_unplug;
+	mddev->queue->issue_flush_fn = raid10_issue_flush;
+
 	/* Calculate max read-ahead size.
 	 * We need to readahead at least twice a whole stripe....
 	 * maybe...