blk-mq: initialize q->nr_requests after calling blk_queue_make_request()

blk_queue_make_requests() overwrites our set value for q->nr_requests,
turning it into the default of 128. Set this appropriately after
initializing queue values in blk_queue_make_request().
Signed-off-by: Jens Axboe <axboe@fb.com>

block/blk-mq.c

@@ -1623,6 +1623,11 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set)
 	if (set->timeout)
 		blk_queue_rq_timeout(q, set->timeout);
 
+	/*
+	 * Do this after blk_queue_make_request() overrides it...
+	 */
+	q->nr_requests = set->queue_depth;
+
 	if (set->ops->complete)
 		blk_queue_softirq_done(q, set->ops->complete);