This is a note to let you know that I've just added the patch titled
net: phy: fix save wrong speed and duplex problem if autoneg is on
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-phy-fix-save-wrong-speed-and-duplex-problem-if-a.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 54d53f24411977e8a9f51cc5bb0c1ed50032b6cb
Author: Guangbin Huang <huangguangbin2@xxxxxxxxxx>
Date: Sat Feb 27 11:05:58 2021 +0800
net: phy: fix save wrong speed and duplex problem if autoneg is on
[ Upstream commit d9032dba5a2b2bbf0fdce67c8795300ec9923b43 ]
If phy uses generic driver and autoneg is on, enter command
"ethtool -s eth0 speed 50" will not change phy speed actually, but
command "ethtool eth0" shows speed is 50Mb/s because phydev->speed
has been set to 50 and no update later.
And duplex setting has same problem too.
However, if autoneg is on, phy only changes speed and duplex according to
phydev->advertising, but not phydev->speed and phydev->duplex. So in this
case, phydev->speed and phydev->duplex don't need to be set in function
phy_ethtool_ksettings_set() if autoneg is on.
Fixes: 51e2a3846eab ("PHY: Avoid unnecessary aneg restarts")
Signed-off-by: Guangbin Huang <huangguangbin2@xxxxxxxxxx>
Signed-off-by: Huazhong Tan <tanhuazhong@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index cc454b8c032c..dd4bf4265a5e 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -335,7 +335,10 @@ int phy_ethtool_ksettings_set(struct phy_device *phydev,
phydev->autoneg = autoneg;
- phydev->speed = speed;
+ if (autoneg == AUTONEG_DISABLE) {
+ phydev->speed = speed;
+ phydev->duplex = duplex;
+ }
phydev->advertising = advertising;
@@ -344,8 +347,6 @@ int phy_ethtool_ksettings_set(struct phy_device *phydev,
else
phydev->advertising &= ~ADVERTISED_Autoneg;
- phydev->duplex = duplex;
-
phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
/* Restart the PHY */
