block: remove redundant check about 'set->nr_hw_queues' in blk_mq_alloc_tag_set()

wangxiaoguang · axboe · commit f9018ac9308e · 2015-03-30T09:04:27.000-06:00
At the beginning of blk_mq_alloc_tag_set(), we have already checked whether
'set-&gt;nr_hw_queues' is zero, so here remove this redundant check.

Signed-off-by: Xiaoguang Wang &lt;wangxg.fnst@cn.fujitsu.com&gt;
Signed-off-by: Jens Axboe &lt;axboe@fb.com&gt;
diff --git a/block/blk-mq.c b/block/blk-mq.c
@@ -2174,7 +2174,7 @@ int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set)
 	if (set->queue_depth < set->reserved_tags + BLK_MQ_TAG_MIN)
 		return -EINVAL;
 
-	if (!set->nr_hw_queues || !set->ops->queue_rq || !set->ops->map_queue)
+	if (!set->ops->queue_rq || !set->ops->map_queue)
 		return -EINVAL;
 
 	if (set->queue_depth > BLK_MQ_MAX_DEPTH) {
