netdev - Re: [PATCH net-next 5/7] tsnep: Add EtherType RX flow classification support

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Date:   Wed, 21 Sep 2022 18:00:42 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Gerhard Engleder <gerhard@...leder-embedded.com>
Cc:     davem@...emloft.net, robh+dt@...nel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH net-next 5/7] tsnep: Add EtherType RX flow
 classification support

On Thu, 15 Sep 2022 22:36:35 +0200 Gerhard Engleder wrote:
> +static int tsnep_add_rule(struct tsnep_adapter *adapter,
> +			  struct tsnep_rxnfc_rule *rule)
> +{
> +	struct tsnep_rxnfc_rule *pred, *cur;
> +
> +	tsnep_enable_rule(adapter, rule);
> +
> +	pred = NULL;
> +	list_for_each_entry(cur, &adapter->rxnfc_rules, list) {
> +		if (cur->location >= rule->location)
> +			break;
> +		pred = cur;
> +	}
> +
> +	list_add(&rule->list, pred ? &pred->list : &adapter->rxnfc_rules);
> +	adapter->rxnfc_count++;
> +
> +	return 0;

This never fails, perhaps the return code is unnecessary