linux-kernel - [PATCH] blk-mq: cleanup additional nr_hw

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Date:	Thu, 15 Jan 2015 13:42:06 +0800
From:	hujianyang <hujianyang@...wei.com>
To:	Jens Axboe <axboe@...com>
CC:	<hch@...radead.org>, open list <linux-kernel@...r.kernel.org>
Subject: [PATCH] blk-mq: cleanup additional nr_hw_queues check

No need to check set->nr_hw_queues twice in blk_mq_alloc_tag_set(),
remove the latter one.

Signed-off-by: hujianyang <hujianyang@...wei.com>
---
 block/blk-mq.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index a7d4a98..eddeccc 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2097,7 +2097,7 @@ 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) {
-- 
1.6.0.2

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