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-rw-r--r--target/linux/mvebu/patches-4.9/404-net-phy-restart-phy-autonegotiation-after-EEE-advert.patch50
1 files changed, 50 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-4.9/404-net-phy-restart-phy-autonegotiation-after-EEE-advert.patch b/target/linux/mvebu/patches-4.9/404-net-phy-restart-phy-autonegotiation-after-EEE-advert.patch
new file mode 100644
index 0000000000..5290e71408
--- /dev/null
+++ b/target/linux/mvebu/patches-4.9/404-net-phy-restart-phy-autonegotiation-after-EEE-advert.patch
@@ -0,0 +1,50 @@
+From: Russell King <rmk+kernel@armlinux.org.uk>
+Date: Thu, 5 Jan 2017 12:21:09 +0000
+Subject: [PATCH] net: phy: restart phy autonegotiation after EEE
+ advertisment change
+
+When the EEE advertisment is changed, we should restart autonegotiation
+to update the link partner with the new EEE settings. Add this trigger
+but only if the advertisment has changed.
+
+Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
+---
+
+--- a/drivers/net/phy/phy.c
++++ b/drivers/net/phy/phy.c
+@@ -1307,16 +1307,33 @@ EXPORT_SYMBOL(phy_ethtool_get_eee);
+ */
+ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
+ {
+- int cap, adv;
++ int cap, old_adv, adv, ret;
+
+ /* Get Supported EEE */
+ cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
+ if (cap < 0)
+ return cap;
+
++ old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
++ if (old_adv < 0)
++ return old_adv;
++
+ adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
+
+- return phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
++ if (old_adv != adv) {
++ ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
++ if (ret < 0)
++ return ret;
++
++ /* Restart autonegotiation so the new modes get sent to the
++ * link partner.
++ */
++ ret = phy_restart_aneg(phydev);
++ if (ret < 0)
++ return ret;
++ }
++
++ return 0;
+ }
+ EXPORT_SYMBOL(phy_ethtool_set_eee);
+