[PATCH net-next v3 1/2] net: phy: Add phy library support to check supported list when autoneg is enabled

[Divya Koppera]

From: Divya Koppera <divya.koppera@xxxxxxxxxxxxx>

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

Signed-off-by: Divya Koppera <divya.koppera@xxxxxxxxxxxxx>
---
 drivers/net/phy/phy.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 785182fa5fe0..cba3af926429 100644
--- 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 &&
-- 
2.17.1