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nvme-fc: update hardware queues before using them

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[ Upstream commit 555f66d0f8 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Daniel Wagner
2021-09-14 11:20:06 +02:00
committed by Greg Kroah-Hartman
parent c4506403e1
commit c251d023ed
1 changed files with 8 additions and 8 deletions
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16
drivers/nvme/host/fc.c
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@@ -2952,14 +2952,6 @@ 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",
@@ -2969,6 +2961,14 @@ 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: