[PATCH net-next 1/2] net: phy: use c45 standard to detect link partner autoneg capability

[Heiner Kallweit]

Currently mii_lpa_mod_linkmode_lpa_t() checks bit LPA_LPACK to detect
whether link partner supports autoneg. This doesn't work correctly at
least on Aquantia AQCS109 when it negotiates 1000Base-T2 mode.
The "link partner is autoneg-capable" bit as defined by clause 45 is
set however. Better let's switch in general to use the clause 45
standard for link partner autoneg detection.

Signed-off-by: Heiner Kallweit <hkallwe...@gmail.com>
---
 drivers/net/phy/phy-c45.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c
index 9e24d9569..666fbb0ee 100644
--- a/drivers/net/phy/phy-c45.c
+++ b/drivers/net/phy/phy-c45.c
@@ -262,12 +262,19 @@ int genphy_c45_read_lpa(struct phy_device *phydev)
 {
        int val;
 
+       val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
+       if (val < 0)
+               return val;
+
+       linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->lp_advertising,
+                        val & MDIO_AN_STAT1_LPABLE);
+
        /* Read the link partner's base page advertisement */
        val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA);
        if (val < 0)
                return val;
 
-       mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, val);
+       mii_adv_mod_linkmode_adv_t(phydev->lp_advertising, val);
        phydev->pause = val & LPA_PAUSE_CAP ? 1 : 0;
        phydev->asym_pause = val & LPA_PAUSE_ASYM ? 1 : 0;
 
-- 
2.21.0