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nvme-rdma: quiesce/unquiesce admin_q instead of start/stop its hw queues

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unlike blk_mq_stop_hw_queues and blk_mq_start_stopped_hw_queues
quiescing/unquiescing respects the submission path rcu grace.
Also make sure to kick the requeue list when appropriate.

Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
This commit is contained in:
Sagi Grimberg 2017-07-02 15:33:32 +03:00
parent 5e599d73c1
commit fb05133972
1 changed files with 4 additions and 3 deletions
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7
drivers/nvme/host/rdma.c
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@ -779,7 +779,7 @@ static void nvme_rdma_error_recovery_work(struct work_struct *work)
if (ctrl->ctrl.queue_count > 1)
nvme_stop_queues(&ctrl->ctrl);
blk_mq_stop_hw_queues(ctrl->ctrl.admin_q);
blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
/* We must take care of fastfail/requeue all our inflight requests */
if (ctrl->ctrl.queue_count > 1)
@ -792,7 +792,7 @@ static void nvme_rdma_error_recovery_work(struct work_struct *work)
* queues are not a live anymore, so restart the queues to fail fast
* new IO
*/
blk_mq_start_stopped_hw_queues(ctrl->ctrl.admin_q, true);
blk_mq_unquiesce_queue(ctrl->ctrl.admin_q);
nvme_start_queues(&ctrl->ctrl);
nvme_rdma_reconnect_or_remove(ctrl);
@ -1636,9 +1636,10 @@ static void nvme_rdma_shutdown_ctrl(struct nvme_rdma_ctrl *ctrl)
if (test_bit(NVME_RDMA_Q_LIVE, &ctrl->queues[0].flags))
nvme_shutdown_ctrl(&ctrl->ctrl);
blk_mq_stop_hw_queues(ctrl->ctrl.admin_q);
blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
blk_mq_tagset_busy_iter(&ctrl->admin_tag_set,
nvme_cancel_request, &ctrl->ctrl);
blk_mq_unquiesce_queue(ctrl->ctrl.admin_q);
nvme_rdma_destroy_admin_queue(ctrl);
}