From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ming Lei Subject: [PATCH V2 3/8] blk-mq: only run hw queues for blk-mq Date: Sat, 2 Sep 2017 02:49:53 +0800 Message-ID: <20170901184958.19452-5-ming.lei@redhat.com> References: <20170901184958.19452-1-ming.lei@redhat.com> Return-path: In-Reply-To: <20170901184958.19452-1-ming.lei@redhat.com> Sender: linux-block-owner@vger.kernel.org To: Jens Axboe , linux-block@vger.kernel.org, Christoph Hellwig , Bart Van Assche , linux-scsi@vger.kernel.org, "Martin K . Petersen" , "James E . J . Bottomley" Cc: Oleksandr Natalenko , Johannes Thumshirn , Tejun Heo , Ming Lei List-Id: linux-scsi@vger.kernel.org This patch just makes it explicitely. Reviewed-by: Johannes Thumshirn Signed-off-by: Ming Lei --- block/blk-mq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 8cf1f7cbef2b..4c532d8612e1 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -125,7 +125,8 @@ void blk_freeze_queue_start(struct request_queue *q) freeze_depth = atomic_inc_return(&q->mq_freeze_depth); if (freeze_depth == 1) { percpu_ref_kill(&q->q_usage_counter); - blk_mq_run_hw_queues(q, false); + if (q->mq_ops) + blk_mq_run_hw_queues(q, false); } } EXPORT_SYMBOL_GPL(blk_freeze_queue_start); -- 2.9.5