netdev - Re: [RFC net-next 03/22] ipv4: support for fib route lwtunnel encap attributes

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Date:	Fri, 10 Jul 2015 17:36:56 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Thomas Graf <tgraf@...g.ch>
Cc:	roopa@...ulusnetworks.com, rshearma@...cade.com,
	ebiederm@...ssion.com, hannes@...essinduktion.org,
	pshelar@...ira.com, jesse@...ira.com, davem@...emloft.net,
	daniel@...earbox.net, tom@...bertland.com, edumazet@...gle.com,
	jiri@...nulli.us, marcelo.leitner@...il.com,
	stephen@...workplumber.org, jpettit@...ira.com, kaber@...sh.net,
	netdev@...r.kernel.org, dev@...nvswitch.org
Subject: Re: [RFC net-next 03/22] ipv4: support for fib route lwtunnel encap
 attributes

On Fri, 2015-07-10 at 16:19 +0200, Thomas Graf wrote:
> From: Roopa Prabhu <roopa@...ulusnetworks.com>


> +	if (oif)
> +		dev = __dev_get_by_index(net, oif);
> +	ret = lwtunnel_build_state(dev, encap_type,
> +				   encap, &lwtstate);
> +	if (!ret) {
> +		lwtunnel_state_get(lwtstate);
> +		ret = lwtunnel_cmp_encap(lwtstate, nh->nh_lwtstate);
> +		lwtunnel_state_put(lwtstate);
> +
> +		return ret;


These _get()/_put() calls do not seem necessary, or buggy.

If refcounting is needed the _get() should be done at the time lwstate
is fetched.


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