netdev - Re: [PATCH v23 net-next 1/6] sched: Struct definition and parsing of dualpi2 qdisc

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Message-ID: <20250716164810.60cb683f@kernel.org>
Date: Wed, 16 Jul 2025 16:48:10 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: chia-yu.chang@...ia-bell-labs.com
Cc: alok.a.tiwari@...cle.com, pctammela@...atatu.com, horms@...nel.org,
 donald.hunter@...il.com, xandfury@...il.com, netdev@...r.kernel.org,
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Subject: Re: [PATCH v23 net-next 1/6] sched: Struct definition and parsing
 of dualpi2 qdisc

On Sun, 13 Jul 2025 12:52:29 +0200 chia-yu.chang@...ia-bell-labs.com
wrote:
> +	err = nla_parse_nested(tb, TCA_DUALPI2_MAX, opt, dualpi2_policy,
> +			       extack);
> +	if (err < 0)
> +		return err;

We should probably have:

+	if (tb[TCA_DUALPI2_STEP_THRESH_PKTS] && tb[TCA_DUALPI2_STEP_THRESH_US]) {
+		NL_SET_ERR_MSG_MOD(extack, "multiple step thresh attributes");
+		return -EINVAL;
+	}

here?