netdev - Re: [PATCH v2 net-next 3/4] net sched actions: calculate add/delete event message size

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Date:   Wed, 07 Mar 2018 14:55:52 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     mrv@...atatu.com
Cc:     netdev@...r.kernel.org, kernel@...atatu.com, jhs@...atatu.com,
        xiyou.wangcong@...il.com, jiri@...nulli.us
Subject: Re: [PATCH v2 net-next 3/4] net sched actions: calculate
 add/delete event message size

From: Roman Mashak <mrv@...atatu.com>
Date: Tue,  6 Mar 2018 16:55:23 -0500

> +static size_t tcf_action_fill_size(const struct tc_action *act)
> +{
> +	if (act->ops->get_fill_size)
> +		return act->ops->get_fill_size(act) +
> +			tcf_action_shared_attrs_size(act);
> +	return 0;
> +}

I don't understand this.

The shared attrs should be considered regardless of whether an action
type specific ->get_fill_size() is implemented.

But instead, you return zero in that case.