From a04dd88f77a4036ceedd42ed1fbefa68008e1850 Mon Sep 17 00:00:00 2001
From: Oleksij Rempel <o.rempel@pengutronix.de>
Date: Fri, 6 May 2022 06:23:53 +0200
Subject: [PATCH] net: phy: genphy_c45_pma_baset1_setup_master_slave: do no set
 unknown configuration

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

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/phy/phy-c45.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c
index ffa2d5cd09fc6..b1f7c63f66cd1 100644
--- a/drivers/net/phy/phy-c45.c
+++ b/drivers/net/phy/phy-c45.c
@@ -86,9 +86,10 @@ int genphy_c45_pma_baset1_setup_master_slave(struct phy_device *phydev)
 		break;
 	case MASTER_SLAVE_CFG_SLAVE_FORCE:
 	case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
+		break;
 	case MASTER_SLAVE_CFG_UNKNOWN:
 	case MASTER_SLAVE_CFG_UNSUPPORTED:
-		break;
+		return 0;
 	default:
 		phydev_warn(phydev, "Unsupported Master/Slave mode\n");
 		return -EOPNOTSUPP;