netdev - [RFC/RFT 23/23] net: phy: Disable EEE advertisement by default

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Message-Id: <20230327170201.2036708-24-andrew@lunn.ch>
Date:   Mon, 27 Mar 2023 19:02:01 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     netdev <netdev@...r.kernel.org>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Oleksij Rempel <o.rempel@...gutronix.de>,
        Andrew Lunn <andrew@...n.ch>
Subject: [RFC/RFT 23/23] net: phy: Disable EEE advertisement by default

EEE should only be advertised if the MAC supports it. Clear
advertising_eee by default. If the MAC indicates it supports EEE by
calling phy_support_eee() advertising_eee will be set to
supported_eee. When the PHY is started, EEE registers will then be
configured.

Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
 drivers/net/phy/phy_device.c | 21 ++++-----------------
 1 file changed, 4 insertions(+), 17 deletions(-)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 30f07623637b..d571738be3d8 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -3153,24 +3153,11 @@ static int phy_probe(struct device *dev)
 	of_set_phy_supported(phydev);
 	phy_advertise_supported(phydev);
 
-	/* Get PHY default EEE advertising modes and handle them as potentially
-	 * safe initial configuration.
+	/* Clear EEE advertising until the MAC indicates it also
+	   supports EEE.
 	 */
-	err = genphy_c45_read_eee_adv(phydev, phydev->advertising_eee);
-	if (err)
-		goto out;
-
-	/* There is no "enabled" flag. If PHY is advertising, assume it is
-	 * kind of enabled.
-	 */
-	phydev->eee_enabled = !linkmode_empty(phydev->advertising_eee);
-
-	/* Some PHYs may advertise, by default, not support EEE modes. So,
-	 * we need to clean them.
-	 */
-	if (phydev->eee_enabled)
-		linkmode_and(phydev->advertising_eee, phydev->supported_eee,
-			     phydev->advertising_eee);
+	linkmode_zero(phydev->advertising_eee);
+	phydev->eee_enabled = false;
 
 	/* Get the EEE modes we want to prohibit. We will ask
 	 * the PHY stop advertising these mode later on
-- 
2.39.2