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nvme-fc: wait for queues to freeze before calling update_hr_hw_queues

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On reconnect, the code currently does not freeze the controller before
possibly updating the number hw queues for the controller.

Add the freeze before updating the number of hw queues.  Note: the queues
are already started and remain started through the reconnect.

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
James Smart 2020-10-16 14:17:24 -07:00 committed by Christoph Hellwig
parent 514a6dc9ec
commit 88e837ed0f
1 changed files with 5 additions and 2 deletions
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7
drivers/nvme/host/fc.c
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@ -2885,11 +2885,14 @@ nvme_fc_recreate_io_queues(struct nvme_fc_ctrl *ctrl)
if (ret)
goto out_delete_hw_queues;
if (prior_ioq_cnt != nr_io_queues)
if (prior_ioq_cnt != nr_io_queues) {
dev_info(ctrl->ctrl.device,
"reconnect: revising io queue count from %d to %d\n",
prior_ioq_cnt, nr_io_queues);
blk_mq_update_nr_hw_queues(&ctrl->tag_set, nr_io_queues);
nvme_wait_freeze(&ctrl->ctrl);
blk_mq_update_nr_hw_queues(&ctrl->tag_set, nr_io_queues);
nvme_unfreeze(&ctrl->ctrl);
}
return 0;