1 files changed, 38 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0342-LF-376-enetc-disable-EEE-autoneg-by-default.patch b/target/linux/layerscape/patches-5.4/701-net-0342-LF-376-enetc-disable-EEE-autoneg-by-default.patch
new file mode 100644
index 0000000000..18b4d77dc9
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/701-net-0342-LF-376-enetc-disable-EEE-autoneg-by-default.patch
@@ -0,0 +1,38 @@
+From cb87015e005f429bff6fc084a61281235ca83d51 Mon Sep 17 00:00:00 2001
+From: Yangbo Lu <yangbo.lu@nxp.com>
+Date: Fri, 6 Dec 2019 12:41:48 +0800
+Subject: [PATCH] LF-376 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>
+---
+ drivers/net/ethernet/freescale/enetc/enetc.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+--- a/drivers/net/ethernet/freescale/enetc/enetc.c
++++ b/drivers/net/ethernet/freescale/enetc/enetc.c
+@@ -1369,6 +1369,7 @@ static int enetc_phy_connect(struct net_
+ {
+ 	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 */
+@@ -1382,6 +1383,10 @@ static int enetc_phy_connect(struct net_
+ 
+ 	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;
+ }
+