netdev - [PATCH net] net: phy: fix aneg restart in phy_ethtool_set

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Date:   Tue, 12 May 2020 21:45:53 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net] net: phy: fix aneg restart in phy_ethtool_set_eee

phy_restart_aneg() enables aneg in the PHY. That's not what we want
if phydev->autoneg is disabled. In this case still update EEE
advertisement register, but don't enable aneg and don't trigger an
aneg restart.

Fixes: f75abeb8338e ("net: phy: restart phy autonegotiation after EEE advertisment change")
Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/phy/phy.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 9bdc924ee..d4bbf79da 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -1240,9 +1240,11 @@ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
 		/* Restart autonegotiation so the new modes get sent to the
 		 * link partner.
 		 */
-		ret = phy_restart_aneg(phydev);
-		if (ret < 0)
-			return ret;
+		if (phydev->autoneg == AUTONEG_ENABLE) {
+			ret = phy_restart_aneg(phydev);
+			if (ret < 0)
+				return ret;
+		}
 	}
 
 	return 0;
-- 
2.26.2