linux-kernel - [PATCH net-next 2/3] net: phy: realtek: change order of calls in C22 read

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Message-ID: <60787816b201fbdd093e0de31e2c5c780ea7678f.1728438615.git.daniel@makrotopia.org>
Date: Wed, 9 Oct 2024 02:54:43 +0100
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>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 2/3] net: phy: realtek: change order of calls in C22
 read_status()

Always call rtlgen_read_status() first, so genphy_read_status() which
is called by it clears bits in case auto-negotiation has not completed.
Also clear 10GBT link-partner advertisement bits in case auto-negotiation
is disabled or has not completed.

Suggested-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
 drivers/net/phy/realtek.c | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
index 717284a71667..895008738ec0 100644
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -956,17 +956,25 @@ static void rtl822xb_update_interface(struct phy_device *phydev)
 
 static int rtl822x_read_status(struct phy_device *phydev)
 {
-	if (phydev->autoneg == AUTONEG_ENABLE) {
-		int lpadv = phy_read_paged(phydev, 0xa5d, 0x13);
+	int lpadv, ret;
 
-		if (lpadv < 0)
-			return lpadv;
+	ret = rtlgen_read_status(phydev);
+	if (ret < 0)
+		return ret;
 
-		mii_10gbt_stat_mod_linkmode_lpa_t(phydev->lp_advertising,
-						  lpadv);
+	if (phydev->autoneg == AUTONEG_DISABLE ||
+	    !phydev->autoneg_complete) {
+		mii_10gbt_stat_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
+		return 0;
 	}
 
-	return rtlgen_read_status(phydev);
+	lpadv = phy_read_paged(phydev, 0xa5d, 0x13);
+	if (lpadv < 0)
+		return lpadv;
+
+	mii_10gbt_stat_mod_linkmode_lpa_t(phydev->lp_advertising, lpadv);
+
+	return 0;
 }
 
 static int rtl822xb_read_status(struct phy_device *phydev)
-- 
2.47.0