netdev - [PATCH RFC net-next 1/7] net: stmmac: remove unnecessary checks in ethtool eee ops

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Message-Id: <E1ugQ2e-006KCw-7V@rmk-PC.armlinux.org.uk>
Date: Mon, 28 Jul 2025 16:45:32 +0100
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH RFC net-next 1/7] net: stmmac: remove unnecessary checks in
 ethtool eee ops

Phylink will check whether the MAC supports the LPI methods in
struct phylink_mac_ops, and return -EOPNOTSUPP if the LPI capabilities
are not provided. stmmac doesn't provide LPI capabilities if
priv->dma_cap.eee is not set.

Therefore, checking the state of priv->dma_cap.eee in the ethtool ops
and returning -EOPNOTSUPP is redundant - let phylink handle this.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index 77758a7299b4..dda7ba1f524d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -852,9 +852,6 @@ static int stmmac_ethtool_op_get_eee(struct net_device *dev,
 {
 	struct stmmac_priv *priv = netdev_priv(dev);
 
-	if (!priv->dma_cap.eee)
-		return -EOPNOTSUPP;
-
 	return phylink_ethtool_get_eee(priv->phylink, edata);
 }
 
@@ -863,9 +860,6 @@ static int stmmac_ethtool_op_set_eee(struct net_device *dev,
 {
 	struct stmmac_priv *priv = netdev_priv(dev);
 
-	if (!priv->dma_cap.eee)
-		return -EOPNOTSUPP;
-
 	return phylink_ethtool_set_eee(priv->phylink, edata);
 }
 
-- 
2.30.2