[PATCH net-next v4 1/7] net: phy: genphy_c45_baset1_an_config_aneg: do no set unknown configuration

[Oleksij Rempel]

Do not change default master/slave autoneg configuration if no
changes was requested.

Fixes: 3da8ffd8545f ("net: phy: Add 10BASE-T1L support in phy-c45")
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
---
 drivers/net/phy/phy-c45.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c
index eefdd67d5556..0014aa6e73c0 100644
--- a/drivers/net/phy/phy-c45.c
+++ b/drivers/net/phy/phy-c45.c
@@ -191,8 +191,12 @@ static int genphy_c45_baset1_an_config_aneg(struct phy_device *phydev)
 	case MASTER_SLAVE_CFG_MASTER_PREFERRED:
 	case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
 		break;
+	case MASTER_SLAVE_CFG_UNKNOWN:
+	case MASTER_SLAVE_CFG_UNSUPPORTED:
+		return 0;
 	default:
-		break;
+		phydev_warn(phydev, "Unsupported Master/Slave mode\n");
+		return -EOPNOTSUPP;
 	}
 
 	switch (phydev->master_slave_set) {
-- 
2.30.2