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nvme-rdma: fix possible hang when failing to set io queues

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We only setup io queues for nvme controllers, and it makes absolutely no
sense to allow a controller (re)connect without any I/O queues.  If we
happen to fail setting the queue count for any reason, we should not allow
this to be a successful reconnect as I/O has no chance in going through.
Instead just fail and schedule another reconnect.

Reported-by: Chao Leng <lengchao@huawei.com>
Fixes: 7110230719 ("nvme-rdma: add a NVMe over Fabrics RDMA host driver")
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sagi Grimberg 2021-03-15 14:04:27 -07:00 committed by Christoph Hellwig
parent 72f572428b
commit c4c6df5fc8
1 changed files with 5 additions and 2 deletions
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7
drivers/nvme/host/rdma.c
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@ -736,8 +736,11 @@ static int nvme_rdma_alloc_io_queues(struct nvme_rdma_ctrl *ctrl)
return ret;
ctrl->ctrl.queue_count = nr_io_queues + 1;
if (ctrl->ctrl.queue_count < 2)
return 0;
if (ctrl->ctrl.queue_count < 2) {
dev_err(ctrl->ctrl.device,
"unable to set any I/O queues\n");
return -ENOMEM;
}
dev_info(ctrl->ctrl.device,
"creating %d I/O queues.\n", nr_io_queues);