[PATCH v3 2/9] nvme-fabrics: allow to queue requests for live queues

[Sagi Grimberg]

>> Guys, we need to resolve this one, this is needed to prevent freeze
>> during reset from hanging.
>>
>> As I said, any I/O that will use the ns->queue shouldn't be denied here
>> because it takes the q_usage_counter and will prevent a freeze (this is
>> true for both fs or user I/O commands).
>>
>> I still think we should allow the admin ones as well and deny them
>> somewhere else if we want to, but I'm fine with keeping this exception
>> now because no one is expected to freeze the admin queue.
>>
>> Let me know what you think. I want it to go into an rc soon.
> 
> Let's do the minimum change variant for now then.

The patch in its current form is that minimum. I suggest we take that
and work our way from there.