[PATCH v2 3/8] blk-mq: use the introduced blk_mq_unquiesce_queue()

[Ming Lei]

blk_mq_unquiesce_queue() is used for unquiescing the
queue explicitly, so replace blk_mq_start_stopped_hw_queues()
with it.

Cc: linux-n...@lists.infradead.org
Cc: linux-scsi@vger.kernel.org
Cc: dm-de...@redhat.com
Signed-off-by: Ming Lei <ming....@redhat.com>
---
 drivers/md/dm-rq.c       | 2 +-
 drivers/nvme/host/core.c | 2 +-
 drivers/scsi/scsi_lib.c  | 5 ++++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index 2af27026aa2e..673fcf075077 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -71,7 +71,7 @@ static void dm_old_start_queue(struct request_queue *q)
 
 static void dm_mq_start_queue(struct request_queue *q)
 {
-       blk_mq_start_stopped_hw_queues(q, true);
+       blk_mq_unquiesce_queue(q);
        blk_mq_kick_requeue_list(q);
 }
 
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 04e115834702..231d36028afc 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2514,7 +2514,7 @@ void nvme_start_queues(struct nvme_ctrl *ctrl)
 
        mutex_lock(&ctrl->namespaces_mutex);
        list_for_each_entry(ns, &ctrl->namespaces, list) {
-               blk_mq_start_stopped_hw_queues(ns->queue, true);
+               blk_mq_unquiesce_queue(ns->queue);
                blk_mq_kick_requeue_list(ns->queue);
        }
        mutex_unlock(&ctrl->namespaces_mutex);
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 814a4bd8405d..72b11f75719c 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -3030,7 +3030,10 @@ scsi_internal_device_unblock(struct scsi_device *sdev,
                return -EINVAL;
 
        if (q->mq_ops) {
-               blk_mq_start_stopped_hw_queues(q, false);
+               if (blk_queue_quiesced(q))
+                       blk_mq_unquiesce_queue(q);
+               else
+                       blk_mq_start_stopped_hw_queues(q, false);
        } else {
                spin_lock_irqsave(q->queue_lock, flags);
                blk_start_queue(q);
-- 
2.9.4