[PATCH net-next v2] net: phylink: add phylink_pcs_loopback() method for PCS loopback support

[Andrew Lunn]

>  static int stmmac_test_phy_loopback(struct stmmac_priv *priv)
>  {
>  	struct stmmac_packet_attrs attr = { };
> +	struct phylink_pcs *pcs;
>  	int ret;
>  
> -	if (!priv->dev->phydev)
> -		return -EOPNOTSUPP;
> +	if (priv->dev->phydev) {
> +		ret = phy_loopback(priv->dev->phydev, true, 0);
> +		if (ret)
> +			return ret;
>  
> -	ret = phy_loopback(priv->dev->phydev, true, 0);
> -	if (ret)
> +		attr.dst = priv->dev->dev_addr;
> +		ret = __stmmac_test_loopback(priv, &attr);
> +
> +		phy_loopback(priv->dev->phydev, false, 0);
>  		return ret;
> +	}
>  
> -	attr.dst = priv->dev->dev_addr;
> -	ret = __stmmac_test_loopback(priv, &attr);
> +	/* Use PCS loopback for interfaces without an external PHY. */

It should not be an either/or. You can have a PCS and an external PHY.
You might actually want to test both.

So i think you want stmmac_test_phy_loopback() and
stmmac_test_pcs_loopback() with the shared code in a helper.

    Andrew

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pw-bot: cr