[PATCH net-next 7/8] net: phy: realtek: check validity of 10GbE link-partner advertisement

[Daniel Golle]

Only use link-partner advertisement bits for 10GbE modes if they are
actually valid. Check LOCALOK and REMOTEOK bits and clear 10GbE modes
unless both of them are set.

Signed-off-by: Daniel Golle <daniel at makrotopia.org>
---
 drivers/net/phy/realtek.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
index cde61a30ac4c..29168f98f451 100644
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -715,6 +715,10 @@ static int rtl822x_read_status(struct phy_device *phydev)
 		if (lpadv < 0)
 			return lpadv;
 
+		if (!(lpadv & MDIO_AN_10GBT_STAT_REMOK) ||
+		    !(lpadv & MDIO_AN_10GBT_STAT_LOCOK))
+			lpadv = 0;
+
 		mii_10gbt_stat_mod_linkmode_lpa_t(phydev->lp_advertising, lpadv);
 	}
 
-- 
2.40.0