From f75abeb8338e2d5bcdfc393dff3950a7039eab5a Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@armlinux.org.uk>
Date: Fri, 31 Mar 2017 10:37:12 +0100
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.
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/phy/phy.c | 21 +++++++++++++++++++--
1 file changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 7b1c93b0233a21..345251f21699a9 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -1332,7 +1332,7 @@ 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;
if (!phydev->drv)
return -EIO;
@@ -1342,12 +1342,29 @@ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
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;
/* Mask prohibited EEE modes */
adv &= ~phydev->eee_broken_modes;
- 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 = genphy_restart_aneg(phydev);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
}
EXPORT_SYMBOL(phy_ethtool_set_eee);
--
GitLab