netdev - [PATCH RFC net-next 4/9] net: stmmac: remove PCS "mode" pause handling

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Message-Id: <E1v1U5t-00000007Hvz-2Xky@rmk-PC.armlinux.org.uk>
Date: Wed, 24 Sep 2025 19:19:57 +0100
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Abhishek Chauhan <quic_abchauha@...cinc.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Alexis Lothore <alexis.lothore@...tlin.com>,
	"Alexis Lothor__" <alexis.lothore@...tlin.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	Boon Khai Ng <boon.khai.ng@...era.com>,
	Choong Yong Liang <yong.liang.choong@...ux.intel.com>,
	Daniel Machon <daniel.machon@...rochip.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Faizal Rahim <faizal.abdul.rahim@...ux.intel.com>,
	Furong Xu <0x1207@...il.com>,
	Huacai Chen <chenhuacai@...nel.org>,
	Inochi Amaoto <inochiama@...il.com>,
	Jacob Keller <jacob.e.keller@...el.com>,
	Jakub Kicinski <kuba@...nel.org>,
	"Jan Petrous (OSS)" <jan.petrous@....nxp.com>,
	Jisheng Zhang <jszhang@...nel.org>,
	Kees Cook <kees@...nel.org>,
	Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	Ley Foon Tan <leyfoon.tan@...rfivetech.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-arm-msm@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	Matthew Gerlach <matthew.gerlach@...era.com>,
	Maxime Chevallier <maxime.chevallier@...tlin.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	netdev@...r.kernel.org,
	Oleksij Rempel <o.rempel@...gutronix.de>,
	Paolo Abeni <pabeni@...hat.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Rohan G Thomas <rohan.g.thomas@...era.com>,
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	Song Yoong Siang <yoong.siang.song@...el.com>,
	Swathi K S <swathi.ks@...sung.com>,
	Tiezhu Yang <yangtiezhu@...ngson.cn>,
	Vinod Koul <vkoul@...nel.org>,
	Vladimir Oltean <olteanv@...il.com>,
	Vladimir Oltean <vladimir.oltean@....com>,
	Yu-Chun Lin <eleanor15x@...il.com>
Subject: [PATCH RFC net-next 4/9] net: stmmac: remove PCS "mode" pause
 handling

Remove the "we always autoneg pause" forcing when the stmmac driver
decides that a "PCS" is present, which blocks passing the ethtool
pause calls to phylink when using SGMII mode.

This prevents the pause results being reported when a PHY is attached
using SGMII mode, or the pause settings being changed in SGMII mode.
There is no reason to prevent this.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 .../net/ethernet/stmicro/stmmac/stmmac_ethtool.c    | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index d89662b48087..c60cd948311e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -424,11 +424,7 @@ stmmac_get_pauseparam(struct net_device *netdev,
 {
 	struct stmmac_priv *priv = netdev_priv(netdev);
 
-	if (priv->hw->pcs) {
-		pause->autoneg = 1;
-	} else {
-		phylink_ethtool_get_pauseparam(priv->phylink, pause);
-	}
+	phylink_ethtool_get_pauseparam(priv->phylink, pause);
 }
 
 static int
@@ -437,12 +433,7 @@ stmmac_set_pauseparam(struct net_device *netdev,
 {
 	struct stmmac_priv *priv = netdev_priv(netdev);
 
-	if (priv->hw->pcs) {
-		pause->autoneg = 1;
-		return 0;
-	} else {
-		return phylink_ethtool_set_pauseparam(priv->phylink, pause);
-	}
+	return phylink_ethtool_set_pauseparam(priv->phylink, pause);
 }
 
 static u64 stmmac_get_rx_normal_irq_n(struct stmmac_priv *priv, int q)
-- 
2.47.3