[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?