From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@fb.com>,
linux-block@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>,
linux-scsi@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>,
"James E . J . Bottomley" <jejb@linux.vnet.ibm.com>
Cc: Bart Van Assche <bart.vanassche@sandisk.com>,
Oleksandr Natalenko <oleksandr@natalenko.name>,
Johannes Thumshirn <jthumshirn@suse.de>,
Cathy Avery <cavery@redhat.com>, Ming Lei <ming.lei@redhat.com>
Subject: [PATCH V4 01/10] blk-mq: only run hw queues for blk-mq
Date: Mon, 11 Sep 2017 19:10:12 +0800 [thread overview]
Message-ID: <20170911111021.25810-2-ming.lei@redhat.com> (raw)
In-Reply-To: <20170911111021.25810-1-ming.lei@redhat.com>
This patch just makes it explicitely.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
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 3f18cff80050..9c364497cc44 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
next prev parent reply other threads:[~2017-09-11 11:11 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-11 11:10 [PATCH V4 0/10] block/scsi: safe SCSI quiescing Ming Lei
2017-09-11 11:10 ` Ming Lei [this message]
2017-09-11 11:10 ` [PATCH V4 02/10] block: tracking request allocation with q_usage_counter Ming Lei
2017-09-11 11:10 ` [PATCH V4 03/10] blk-mq: rename blk_mq_[freeze|unfreeze]_queue Ming Lei
2017-09-11 11:10 ` [PATCH V4 04/10] blk-mq: rename blk_mq_freeze_queue_wait as blk_freeze_queue_wait Ming Lei
2017-09-11 11:10 ` [PATCH V4 05/10] block: rename .mq_freeze_wq and .mq_freeze_depth Ming Lei
2017-09-11 11:10 ` [PATCH V4 06/10] block: pass flags to blk_queue_enter() Ming Lei
2017-09-11 11:10 ` [PATCH V4 07/10] block: introduce preempt version of blk_[freeze|unfreeze]_queue Ming Lei
2017-09-11 11:10 ` [PATCH V4 08/10] block: allow to allocate req with RQF_PREEMPT when queue is preempt frozen Ming Lei
2017-09-11 16:03 ` Bart Van Assche
2017-09-12 3:40 ` Ming Lei
2017-09-13 16:48 ` Ming Lei
2017-09-13 17:28 ` Bart Van Assche
2017-09-13 17:48 ` Ming Lei
2017-09-13 19:07 ` Bart Van Assche
2017-09-14 1:15 ` Ming Lei
2017-09-14 13:37 ` Bart Van Assche
2017-09-14 16:18 ` Ming Lei
2017-09-11 11:10 ` [PATCH V4 09/10] SCSI: transport_spi: resume a quiesced device Ming Lei
2017-09-11 11:10 ` [PATCH V4 10/10] SCSI: preempt freeze block queue when SCSI device is put into quiesce Ming Lei
2017-09-11 21:24 ` [PATCH V4 0/10] block/scsi: safe SCSI quiescing Oleksandr Natalenko
2017-09-12 19:03 ` Cathy Avery
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