From: Arun Ramadoss <arun.ramadoss@microchip.com>
Date: Mon, 7 Mar 2022 21:45:14 +0530
Subject: net: phy: exported the genphy_read_master_slave function
Patch-mainline: v5.18-rc1
Git-commit: 64807c2321512f67959e51f09e302c145c336184
References: jsc#PED-829

genphy_read_master_slave function allows to configure the master/slave
for gigabit phys only. In order to use this function irrespective of
speed, moved the speed check to the genphy_read_status call.

Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/phy/phy_device.c |   19 +++++++++----------
 include/linux/phy.h          |    1 +
 2 files changed, 10 insertions(+), 10 deletions(-)

--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -2052,17 +2052,11 @@ static int genphy_setup_master_slave(str
 				   CTL1000_PREFER_MASTER), ctl);
 }
 
-static int genphy_read_master_slave(struct phy_device *phydev)
+int genphy_read_master_slave(struct phy_device *phydev)
 {
 	int cfg, state;
 	int val;
 
-	if (!phydev->is_gigabit_capable) {
-		phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED;
-		phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
-		return 0;
-	}
-
 	phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
 	phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
 
@@ -2103,6 +2097,7 @@ static int genphy_read_master_slave(stru
 
 	return 0;
 }
+EXPORT_SYMBOL(genphy_read_master_slave);
 
 /**
  * genphy_restart_aneg - Enable and Restart Autonegotiation
@@ -2397,14 +2392,18 @@ int genphy_read_status(struct phy_device
 	if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
 		return 0;
 
+	phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED;
+	phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
 	phydev->speed = SPEED_UNKNOWN;
 	phydev->duplex = DUPLEX_UNKNOWN;
 	phydev->pause = 0;
 	phydev->asym_pause = 0;
 
-	err = genphy_read_master_slave(phydev);
-	if (err < 0)
-		return err;
+	if (phydev->is_gigabit_capable) {
+		err = genphy_read_master_slave(phydev);
+		if (err < 0)
+			return err;
+	}
 
 	err = genphy_read_lpa(phydev);
 	if (err < 0)
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1543,6 +1543,7 @@ int genphy_update_link(struct phy_device
 int genphy_read_lpa(struct phy_device *phydev);
 int genphy_read_status_fixed(struct phy_device *phydev);
 int genphy_read_status(struct phy_device *phydev);
+int genphy_read_master_slave(struct phy_device *phydev);
 int genphy_suspend(struct phy_device *phydev);
 int genphy_resume(struct phy_device *phydev);
 int genphy_loopback(struct phy_device *phydev, bool enable);