linux-kernel - [PATCH net 3/3] net: phy: realtek: always clear NBase-T lpa

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Message-ID: <566d4771d68a1e18d2d48860e25891e468e26551.1736951652.git.daniel@makrotopia.org>
Date: Wed, 15 Jan 2025 14:45:00 +0000
From: Daniel Golle <daniel@...rotopia.org>
To: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Daniel Golle <daniel@...rotopia.org>,
	"Russell King (Oracle)" <linux@...linux.org.uk>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net 3/3] net: phy: realtek: always clear NBase-T lpa

Clear NBase-T link partner advertisement before calling
rtlgen_read_status() to avoid phy_resolve_aneg_linkmode() wrongly
setting speed and duplex.

This fixes bogus 2.5G/5G/10G link partner advertisement and thus
speed and duplex being set by phy_resolve_aneg_linkmode() due to stale
NBase-T lpa.

Fixes: 68d5cd09e891 ("net: phy: realtek: change order of calls in C22 read_status()")
Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
 drivers/net/phy/realtek.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
index 93704abb6787..9cefca1aefa1 100644
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -952,15 +952,15 @@ static int rtl822x_read_status(struct phy_device *phydev)
 {
 	int lpadv, ret;
 
+	mii_10gbt_stat_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
+
 	ret = rtlgen_read_status(phydev);
 	if (ret < 0)
 		return ret;
 
 	if (phydev->autoneg == AUTONEG_DISABLE ||
-	    !phydev->autoneg_complete) {
-		mii_10gbt_stat_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
+	    !phydev->autoneg_complete)
 		return 0;
-	}
 
 	lpadv = phy_read_paged(phydev, 0xa5d, 0x13);
 	if (lpadv < 0)
-- 
2.47.1