[PATCH WIP/RFC v3 3/6] nvme_rdma: keep a ref on the ctrl during delete/flush

[Sagi Grimberg]

>>> -	/* Queue controller deletion */
>>> +	/*
>>> +	 * Queue controller deletion. Keep a reference until all
>>> +	 * work is flushed since delete_work will free the ctrl mem
>>> +	 */
>>> +	kref_get(&ctrl->ctrl.kref);
>>
>> kref_get_unless_zero?
>>
>
> At the top of nvme_rdma_device_unplug(), we change the ctrl state to DELETING.
> If that succeeded, and thus we own the delete process, and are about to kref the
> controller, how could the controller ref be 0?  If it is, it is probably freed
> which means we're in a bad way...

I meant in the del_ctrl part...