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nvme-fc: update hardware queues before using them

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In case the number of hardware queues changes, we need to update the
tagset and the mapping of ctx to hctx first.

If we try to create and connect the I/O queues first, this operation
will fail (target will reject the connect call due to the wrong number
of queues) and hence we bail out of the recreate function. Then we
will to try the very same operation again, thus we don't make any
progress.

Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Daniel Wagner 2021-09-14 11:20:06 +02:00 committed by Christoph Hellwig
parent 858560b276
commit 555f66d0f8
1 changed files with 8 additions and 8 deletions
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16
drivers/nvme/host/fc.c
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@ -2951,14 +2951,6 @@ nvme_fc_recreate_io_queues(struct nvme_fc_ctrl *ctrl)
if (ctrl->ctrl.queue_count == 1)
return 0;
ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.sqsize + 1);
if (ret)
goto out_free_io_queues;
ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.sqsize + 1);
if (ret)
goto out_delete_hw_queues;
if (prior_ioq_cnt != nr_io_queues) {
dev_info(ctrl->ctrl.device,
"reconnect: revising io queue count from %d to %d\n",
@ -2968,6 +2960,14 @@ nvme_fc_recreate_io_queues(struct nvme_fc_ctrl *ctrl)
nvme_unfreeze(&ctrl->ctrl);
}
ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.sqsize + 1);
if (ret)
goto out_free_io_queues;
ret = nvme_fc_connect_io_queues(ctrl, ctrl->ctrl.sqsize + 1);
if (ret)
goto out_delete_hw_queues;
return 0;
out_delete_hw_queues: