linux-kernel - [PATCH] blk-mq: kick requeue list in blk_mq_requeue

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Date:	Tue, 10 Jun 2014 12:52:05 +0800
From:	Ming Lei <tom.leiming@...il.com>
To:	Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org
Cc:	Ming Lei <tom.leiming@...il.com>,
	Matias Bjørling <m@...rling.me>,
	Christoph Hellwig <hch@....de>
Subject: [PATCH] blk-mq: kick requeue list in blk_mq_requeue_request()

blk_mq_requeue_request() should kick off the requeue list so
that the request can be scheduled to queue finally.

In nvme conversion patch, blk_mq_requeue_request() is called
to requeue failed request from completion handler, this patch
fixes the issue and makes the block API working as expected.

Cc: Matias Bjørling <m@...rling.me>
Cc: Christoph Hellwig <hch@....de>
Signed-off-by: Ming Lei <tom.leiming@...il.com>
---
 block/blk-mq.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index cb4c785..4c78539 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -462,6 +462,7 @@ void blk_mq_requeue_request(struct request *rq)
 
 	BUG_ON(blk_queued_rq(rq));
 	blk_mq_add_to_requeue_list(rq, true);
+	blk_mq_kick_requeue_list(rq->q);
 }
 EXPORT_SYMBOL(blk_mq_requeue_request);
 
-- 
1.7.9.5

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