Re: [PATCH net-next v2 2/3] net: phy: broadcom: Add support for Wake-on-LAN

[Paolo Abeni]

Hi,

On Tue, 2023-05-09 at 15:34 -0700, Florian Fainelli wrote:
> @@ -821,7 +917,28 @@ static int bcm54xx_phy_probe(struct phy_device *phydev)
>  	if (IS_ERR(priv->ptp))
>  		return PTR_ERR(priv->ptp);
>  
> -	return 0;
> +	/* We cannot utilize the _optional variant here since we want to know
> +	 * whether the GPIO descriptor exists or not to advertise Wake-on-LAN
> +	 * support or not.
> +	 */
> +	wakeup_gpio = devm_gpiod_get(&phydev->mdio.dev, "wakeup", GPIOD_IN);
> +	if (PTR_ERR(wakeup_gpio) == -EPROBE_DEFER)
> +		return PTR_ERR(wakeup_gpio);
> +
> +	if (!IS_ERR(wakeup_gpio)) {
> +		priv->wake_irq = gpiod_to_irq(wakeup_gpio);
> +		ret = irq_set_irq_type(priv->wake_irq, IRQ_TYPE_LEVEL_LOW);
> +		if (ret)
> +			return ret;
> +	}
> +
> +	/* If we do not have a main interrupt or a side-band wake-up interrupt,
> +	 * then the device cannot be marked as wake-up capable.
> +	 */
> +	if (!bcm54xx_phy_can_wakeup(phydev))
> +		return ret;

AFAICS, as this point 'ret' is 0, so the above is confusing. Do you
intend the probe to complete successfully? If so, would not be
better/more clear:

		return 0;

?

Thanks,

Paolo