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

[Sagi Grimberg]

On 01/09/16 11:36, Christoph Hellwig wrote:
> On Tue, Aug 30, 2016 at 08:24:50PM +0300, Sagi Grimberg wrote:
>>
>>> -	/* 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?
>
> How could the refcount be zero here?

If another del_ctrl is invoked while the first puts the
final ref?