netdev - [PATCH net-next v2 1/6] net: stmmac: remove eee_enabled/eee_active in stmmac_ethtool_op_get

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Message-Id: <E1rWbMs-002cCV-EE@rmk-PC.armlinux.org.uk>
Date: Sun, 04 Feb 2024 12:13:02 +0000
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>,
	bcm-kernel-feedback-list@...adcom.com,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	Byungho An <bh74.an@...sung.com>,
	Clark Wang <xiaoning.wang@....com>,
	"David S. Miller" <davem@...emloft.net>,
	Doug Berger <opendmb@...il.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Jose Abreu <joabreu@...opsys.com>,
	Justin Chen <justin.chen@...adcom.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	netdev@...r.kernel.org,
	NXP Linux Team <linux-imx@....com>,
	Paolo Abeni <pabeni@...hat.com>,
	Shenwei Wang <shenwei.wang@....com>,
	Vladimir Oltean <olteanv@...il.com>,
	Wei Fang <wei.fang@....com>
Subject: [PATCH net-next v2 1/6] net: stmmac: remove eee_enabled/eee_active in
 stmmac_ethtool_op_get_eee()

stmmac_ethtool_op_get_eee() sets both eee_enabled and eee_active, and
then goes on to call phylink_ethtool_get_eee().

phylink_ethtool_get_eee() will return -EOPNOTSUPP if there is no PHY
present, otherwise calling phy_ethtool_get_eee() which in turn will call
genphy_c45_ethtool_get_eee().

genphy_c45_ethtool_get_eee() will overwrite eee_enabled and eee_active
with its own interpretation from the PHYs settings and negotiation
result.

Thus, when there is no PHY, stmmac_ethtool_op_get_eee() will fail with
-EOPNOTSUPP, meaning eee_enabled and eee_active will not be returned to
userspace. When there is a PHY, eee_enabled and eee_active will be
overwritten by phylib, making the setting of these members in
stmmac_ethtool_op_get_eee() entirely unnecessary.

Remove this code, thus simplifying stmmac_ethtool_op_get_eee().

Reviewed-by: Andrew Lunn <andrew@...n.ch>
Reviewed-by: Florian Fainelli <florian.fainelli@...adcom.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index bbecb3b89535..411c3ac8cb17 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -859,8 +859,6 @@ static int stmmac_ethtool_op_get_eee(struct net_device *dev,
 	if (!priv->dma_cap.eee)
 		return -EOPNOTSUPP;
 
-	edata->eee_enabled = priv->eee_enabled;
-	edata->eee_active = priv->eee_active;
 	edata->tx_lpi_timer = priv->tx_lpi_timer;
 	edata->tx_lpi_enabled = priv->tx_lpi_enabled;
 
-- 
2.30.2