Commit a4db9055 authored by Heiner Kallweit's avatar Heiner Kallweit Committed by Jakub Kicinski

net: phy: fix duplex out of sync problem while changing settings

As reported by Zhang there's a small issue if in forced mode the duplex
mode changes with the link staying up [0]. In this case the MAC isn't
notified about the change.

The proposed patch relies on the phylib state machine and ignores the
fact that there are drivers that uses phylib but not the phylib state
machine. So let's don't change the behavior for such drivers and fix
it w/o re-adding state PHY_FORCING for the case that phylib state
machine is used.

[0] https://lore.kernel.org/netdev/a5c26ffd-4ee4-a5e6-4103-873208ce0dc5@huawei.com/T/

Fixes: 2bd229df ("net: phy: remove state PHY_FORCING")
Reported-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
Tested-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/7b8b9456-a93f-abbc-1dc5-a2c2542f932c@gmail.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 96d0c9be
......@@ -815,7 +815,12 @@ int phy_ethtool_ksettings_set(struct phy_device *phydev,
phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
/* Restart the PHY */
_phy_start_aneg(phydev);
if (phy_is_started(phydev)) {
phydev->state = PHY_UP;
phy_trigger_machine(phydev);
} else {
_phy_start_aneg(phydev);
}
mutex_unlock(&phydev->lock);
return 0;
......
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