[PATCH 2/2] nvme-tcp: support specifying the congestion-control

[Christoph Hellwig]

I'll let the NVMe/TCP maintainer comment on the actual functionality,
but:

> +			p = match_strdup(args);
> +			if (!p) {
> +				ret = -ENOMEM;
> +				goto out;
> +			}
> +
> +			key = tcp_ca_get_key_by_name(NULL, p, &ecn_ca);
> +			if (key == TCP_CA_UNSPEC) {
> +				pr_err("congestion control %s not found.\n",
> +				       p);
> +				ret = -EINVAL;
> +				kfree(p);
> +				goto out;
> +			}

We can't just call networking code from nvme-fabrics.ko