net: phy: Fix "link partner" information disappear issue
Some drivers just call phy_ethtool_ksettings_set() to set the links, for those phy drivers that use genphy_read_status(), if autoneg is on, and the link is up, than execute "ethtool -s ethx autoneg on" will cause "link partner" information disappear. The call trace is phy_ethtool_ksettings_set()->phy_start_aneg() ->linkmode_zero(phydev->lp_advertising)->genphy_read_status(), the link didn't change, so genphy_read_status() just return, and phydev->lp_advertising is zero now. This patch moves the clear operation of lp_advertising from phy_start_aneg() to genphy_read_lpa()/genphy_c45_read_lpa(), and if autoneg on and autoneg not complete, just clear what the generic functions care about. Fixes: 88d6272a ("net: phy: avoid unneeded MDIO reads in genphy_read_status") Signed-off-by: NYonglong Liu <liuyonglong@huawei.com> Reviewed-by: NHeiner Kallweit <hkallweit1@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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