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enetc: disable EEE autoneg by default 

The EEE support has not been enabled on ENETC, but it may connect
to a PHY which supports EEE and advertises EEE by default, while
its link partner also advertises EEE. If this happens, the PHY enters
low power mode when the traffic rate is low and causes packet loss.
This patch disables EEE advertisement by default for any PHY that
ENETC connects to, to prevent the above unwanted outcome.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yangbo Lu 2019-12-06 17:53:35 +08:00 committed by David S. Miller
parent ae72555b41
commit a6a10d45d1
1 changed files with 5 additions and 0 deletions
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5
drivers/net/ethernet/freescale/enetc/enetc.c
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@ -1332,6 +1332,7 @@ static int enetc_phy_connect(struct net_device *ndev)
{
struct enetc_ndev_priv *priv = netdev_priv(ndev);
struct phy_device *phydev;
struct ethtool_eee edata;
if (!priv->phy_node)
return 0; /* phy-less mode */
@ -1345,6 +1346,10 @@ static int enetc_phy_connect(struct net_device *ndev)
phy_attached_info(phydev);
/* disable EEE autoneg, until ENETC driver supports it */
memset(&edata, 0, sizeof(struct ethtool_eee));
phy_ethtool_set_eee(phydev, &edata);
return 0;
}