md/raid0: apply base queue limits *before* disk_stack_limits

commit 66eefe5d upstream.

Calling e.g. blk_queue_max_hw_sectors() after calls to
disk_stack_limits() discards the settings determined by
disk_stack_limits().
So we need to make those calls first.

Fixes: 199dc6ed ("md/raid0: update queue parameter in a safer location.")
Reported-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.com>
[bwh: Backported to 3.2: the code being moved looks a little different]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

drivers/md/raid0.c

@@ -358,16 +358,17 @@ static int raid0_run(struct mddev *mddev)
 	}
 	conf = mddev->private;
 
-	list_for_each_entry(rdev, &mddev->disks, same_set) {
-		disk_stack_limits(mddev->gendisk, rdev->bdev,
-				  rdev->data_offset << 9);
-	}
 	blk_queue_max_hw_sectors(mddev->queue, mddev->chunk_sectors);
 
 	blk_queue_io_min(mddev->queue, mddev->chunk_sectors << 9);
 	blk_queue_io_opt(mddev->queue,
 			 (mddev->chunk_sectors << 9) * mddev->raid_disks);
 
+	list_for_each_entry(rdev, &mddev->disks, same_set) {
+		disk_stack_limits(mddev->gendisk, rdev->bdev,
+				  rdev->data_offset << 9);
+	}
+
 	/* calculate array device size */
 	md_set_array_sectors(mddev, raid0_size(mddev, 0, 0));