net: phy: improve phy_disable_eee_mode

If a mode is to be disabled, remove it from advertising_eee.
Disabling EEE modes shall be done before calling phy_start(),
warn if that's not the case.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/92164896-38ff-4474-b98b-e83fc05b9509@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

include/linux/phy.h

@@ -1355,7 +1355,10 @@ static inline bool phy_is_started(struct phy_device *phydev)
  */
 static inline void phy_disable_eee_mode(struct phy_device *phydev, u32 link_mode)
 {
+	WARN_ON(phy_is_started(phydev));
+
 	linkmode_set_bit(link_mode, phydev->eee_disabled_modes);
+	linkmode_clear_bit(link_mode, phydev->advertising_eee);
 }
 
 void phy_resolve_aneg_pause(struct phy_device *phydev);