linux-kernel - [PATCH] blk-mq: Remove unnecessary validation before calling blk_mq_sched_completed

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Message-Id: <969d0e9f637b2a0dbfb3d284abfbed6fc7665ea4.1593846855.git.baolin.wang7@gmail.com>
Date:   Sat,  4 Jul 2020 15:28:21 +0800
From:   Baolin Wang <baolin.wang@...ux.alibaba.com>
To:     axboe@...nel.dk
Cc:     ming.lei@...hat.com, baolin.wang@...ux.alibaba.com,
        baolin.wang7@...il.com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] blk-mq: Remove unnecessary validation before calling blk_mq_sched_completed_request()

We've already validated the 'q->elevator' before calling ->ops.completed_request()
in blk_mq_sched_completed_request(), thus no need to validate rq->internal_tag again,
and remove it.

Signed-off-by: Baolin Wang <baolin.wang@...ux.alibaba.com>
---
 block/blk-mq.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index abcf590f6238..78572b2e1675 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -550,8 +550,7 @@ inline void __blk_mq_end_request(struct request *rq, blk_status_t error)
 		blk_stat_add(rq, now);
 	}
 
-	if (rq->internal_tag != BLK_MQ_NO_TAG)
-		blk_mq_sched_completed_request(rq, now);
+	blk_mq_sched_completed_request(rq, now);
 
 	blk_account_io_done(rq, now);
 
-- 
2.17.1