linux-kernel - Re: [net-next, 1/2] enetc: Configure the Time-Aware Scheduler via tc-taprio offload

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Date:   Mon, 11 Nov 2019 21:50:47 -0800 (PST)
From:   David Miller <davem@...hat.com>
To:     po.liu@....com
Cc:     claudiu.manoil@....com, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, vinicius.gomes@...el.com,
        vladimir.oltean@....com, alexandru.marginean@....com,
        xiaoliang.yang_1@....com, roy.zang@....com, mingkai.hu@....com,
        jerry.huang@....com, leoyang.li@....com
Subject: Re: [net-next, 1/2] enetc: Configure the Time-Aware Scheduler via
 tc-taprio offload

From: Po Liu <po.liu@....com>
Date: Mon, 11 Nov 2019 04:41:26 +0000

> +fsl-enetc-$(CONFIG_NET_SCH_TAPRIO) += enetc_qos.o

Code is Kconfig guarded.
> +	case TC_SETUP_QDISC_TAPRIO:
> +		return enetc_setup_tc_taprio(ndev, type_data);

Yet invoked unconditionally.

I can see just by reading your code that various configurations will
result in link errors.

 ...
> +int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data)
> +{
> +	struct tc_taprio_qopt_offload *taprio = type_data;
> +	struct enetc_ndev_priv *priv = netdev_priv(ndev);
> +	int i;
> +
> +	for (i = 0; i < priv->num_tx_rings; i++)
> +		enetc_set_bdr_prio(&priv->si->hw,
> +				   priv->tx_ring[i]->index,
> +				   taprio->enable ? i : 0);
> +
> +	return enetc_setup_taprio(ndev, taprio);
> +}
> -- 
> 2.17.1
>