From: Greg Kroah-Hartman gregkh@linuxfoundation.org
From: Guangbin Huang huangguangbin2@huawei.com
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@huawei.com Signed-off-by: Huazhong Tan tanhuazhong@huawei.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -276,14 +276,16 @@ 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;