[PATCH v4 4/5] nvme-rdma: avoid IO error for nvme native multipath

[Sagi Grimberg]

>>> @@ -2084,8 +2085,10 @@ static blk_status_t nvme_rdma_queue_rq(struct 
>>> blk_mq_hw_ctx *hctx,
>>>       err = nvme_rdma_post_send(queue, sqe, req->sge, req->num_sge,
>>>               req->mr ? &req->reg_wr.wr : NULL);
>>> -    if (unlikely(err))
>>> +    if (unlikely(err)) {
>>> +        driver_error = true;
>>>           goto err_unmap;
>>
>> Why not just call set the status and call nvme_rdma_complete_rq and
>> return here?
> If the err is ENOMEM or EAGAIN, I am not sure the err must be a
> path-related error for all HBA drivers. So reused the error check code.
> I think it would be more reasonable to assume any errors returned by HBA
> driver as path-related errors.
> If you think so, I will modify it in next patch version.

Meant to do that only for -EIO. We should absolutely not do any of this
for stuff like EINVAL, EOPNOTSUPP, EPERM or any strange error that may
return due to a bug or anything like that.