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Commit c81545f9 authored by Sagi Grimberg's avatar Sagi Grimberg
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nvme-pci: quiesce/unquiesce admin_q instead of start/stop its hw queues 



unlike blk_mq_stop_hw_queues and blk_mq_start_stopped_hw_queues
quiescing/unquiescing respects the submission path rcu grace.

Reviewed-by: default avatarMing Lei <ming.lei@redhat.com>
Signed-off-by: default avatarSagi Grimberg <sagi@grimberg.me>
parent c1c0ffff

drivers/nvme/host/pci.c

+3 −3
Original line number Diff line number Diff line
@@ -1125,7 +1125,7 @@ static int nvme_suspend_queue(struct nvme_queue *nvmeq) 
	spin_unlock_irq(&nvmeq->q_lock);



	if (!nvmeq->qid && nvmeq->dev->ctrl.admin_q)

		blk_mq_stop_hw_queues(nvmeq->dev->ctrl.admin_q);

		blk_mq_quiesce_queue(nvmeq->dev->ctrl.admin_q);



	pci_free_irq(to_pci_dev(nvmeq->dev->dev), vector, nvmeq);
@@ -1315,7 +1315,7 @@ static void nvme_dev_remove_admin(struct nvme_dev *dev) 
		 * user requests may be waiting on a stopped queue. Start the

		 * queue to flush these to completion.

		 */

		blk_mq_start_stopped_hw_queues(dev->ctrl.admin_q, true);

		blk_mq_unquiesce_queue(dev->ctrl.admin_q);

		blk_cleanup_queue(dev->ctrl.admin_q);

		blk_mq_free_tag_set(&dev->admin_tagset);

	}
@@ -1352,7 +1352,7 @@ static int nvme_alloc_admin_tags(struct nvme_dev *dev) 
			return -ENODEV;

		}

	} else

		blk_mq_start_stopped_hw_queues(dev->ctrl.admin_q, true);

		blk_mq_unquiesce_queue(dev->ctrl.admin_q);



	return 0;

}