netdev - Re: [PATCH net-next] net: ngbe: Add ngbe mdio bus driver.

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Date:   Mon, 5 Dec 2022 18:14:35 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Mengyuan Lou <mengyuanlou@...-swift.com>
Cc:     netdev@...r.kernel.org, jiawenwu@...stnetic.com
Subject: Re: [PATCH net-next] net: ngbe: Add ngbe mdio bus driver.

> +static void ngbe_phy_fixup(struct ngbe_hw *hw)
> +{
> +	struct phy_device *phydev = hw->phydev;
> +	struct ethtool_eee eee;
> +
> +	if (hw->mac_type != ngbe_mac_type_mdi)
> +		return;
> +	/* disable EEE, EEE not supported by mac */
> +	memset(&eee, 0, sizeof(eee));
> +	phy_ethtool_set_eee(phydev, &eee);
> +
> +	linkmode_zero(phydev->supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
> +			 phydev->supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
> +			 phydev->supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT,
> +			 phydev->supported);

As a side effect of linkmode_zero(phydev->supported) you also removed
any PAUSE capabilities of the PHY.

I assume the real issue here is that your MAC does not support half
duplex? So use:

phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);

etc.

There was a few comments i made on the previous version which have not
yet been addresses. Please fix them for the next version.

    Andrew