From: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com>
Date: Mon, 30 Mar 2015 05:19:14 +0000 (+0800)
Subject: block: remove redundant check about 'set->nr_hw_queues' in blk_mq_alloc_tag_set()
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=f9018ac9308ea415e659cfbdda040504ef92597b;p=deliverable%2Flinux.git

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

At the beginning of blk_mq_alloc_tag_set(), we have already checked whether
'set->nr_hw_queues' is zero, so here remove this redundant check.

Signed-off-by: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 59fa23935a0f..37f14362aa15 100644
--- 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) {