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 5.10-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-autoneg-is-on.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d9032dba5a2b2bbf0fdce67c8795300ec9923b43 Mon Sep 17 00:00:00 2001
From: Guangbin Huang <huangguangbin2@xxxxxxxxxx>
Date: Sat, 27 Feb 2021 11:05:58 +0800
Subject: net: phy: fix save wrong speed and duplex problem if autoneg is on
From: Guangbin Huang <huangguangbin2@xxxxxxxxxx>
commit d9032dba5a2b2bbf0fdce67c8795300ec9923b43 upstream.
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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/phy/phy.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -293,14 +293,16 @@ int phy_ethtool_ksettings_set(struct phy
phydev->autoneg = autoneg;
- phydev->speed = speed;
+ if (autoneg == AUTONEG_DISABLE) {
+ phydev->speed = speed;
+ phydev->duplex = duplex;
+ }
linkmode_copy(phydev->advertising, advertising);
linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
phydev->advertising, autoneg == AUTONEG_ENABLE);
- phydev->duplex = duplex;
phydev->master_slave_set = cmd->base.master_slave_cfg;
phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
Patches currently in stable-queue which might be from huangguangbin2@xxxxxxxxxx are
queue-5.10/net-phy-fix-save-wrong-speed-and-duplex-problem-if-autoneg-is-on.patch
