[PATCH] Set max_sectors for raid0 only, not for all raid levels.

raid1 and multipath have not concept of a chunksize, so basing
max_sectors on it is obviously wrong.

Similary 'linear' has a very different concept of chunksize and
max_sectors doesn't apply.

raid5 does have relevant chunk_size concept, but it has code to
effectively handle any chunksize.

So we only need to set max_sectors based on chunk_size in raid0.

drivers/md/md.c

@@ -1610,12 +1610,6 @@ static int do_md_run(mddev_t * mddev)
 	spin_unlock(&pers_lock);
 
 	blk_queue_make_request(mddev->queue, mddev->pers->make_request);
-	printk("%s: setting max_sectors to %d, segment boundary to %d\n",
-		disk->disk_name,
-		chunk_size >> 9,
-		(chunk_size>>1)-1);
-	blk_queue_max_sectors(mddev->queue, chunk_size >> 9);
-	blk_queue_segment_boundary(mddev->queue, (chunk_size>>1) - 1);
 	mddev->queue->queuedata = mddev;
 
 	err = mddev->pers->run(mddev);

drivers/md/raid0.c

@@ -231,6 +231,13 @@ static int raid0_run (mddev_t *mddev)
 	mdk_rdev_t *rdev;
 	struct list_head *tmp;
 
+	printk("md%d: setting max_sectors to %d, segment boundary to %d\n",
+	       mdidx(mddev),
+	       mddev->chunk_size >> 9,
+	       (mddev->chunk_size>>1)-1);
+	blk_queue_max_sectors(mddev->queue, mddev->chunk_size >> 9);
+	blk_queue_segment_boundary(mddev->queue, (mddev->chunk_size>>1) - 1);
+
 	conf = kmalloc(sizeof (raid0_conf_t), GFP_KERNEL);
 	if (!conf)
 		goto out;