net: phy: Add phy library support to check supported list when autoneg is enabled

Adds support in phy library to accept autoneg configuration only when
feature is enabled in supported list.

Signed-off-by: Divya Koppera <divya.koppera@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20240821055906.27717-2-Divya.Koppera@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 785182fa5fe01f950de7cb5082865fd8c3c5ba3a..cba3af926429d890b2d9a0fc10c07c359f132d90 100644 (file)
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -1089,7 +1089,10 @@ int phy_ethtool_ksettings_set(struct phy_device *phydev,
        if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
                return -EINVAL;
 
-       if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
+       if (autoneg == AUTONEG_ENABLE &&
+           (linkmode_empty(advertising) ||
+            !linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
+                               phydev->supported)))
                return -EINVAL;
 
        if (autoneg == AUTONEG_DISABLE &&