From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Sat, 23 Nov 2019 17:28:37 +0100
Subject: net: phy: add helpers phy_(un)lock_mdio_bus
Patch-mainline: v5.5-rc1
Git-commit: bec170e55982c2d3b8e1beccadf16e288fe6fb5a
References: bsc#1154353

Add helpers to make locking/unlocking the MDIO bus easier.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/phy/phy-core.c |   28 ++++++++++++++--------------
 include/linux/phy.h        |   10 ++++++++++
 2 files changed, 24 insertions(+), 14 deletions(-)

--- a/drivers/net/phy/phy-core.c
+++ b/drivers/net/phy/phy-core.c
@@ -380,9 +380,9 @@ int phy_read_mmd(struct phy_device *phyd
 {
 	int ret;
 
-	mutex_lock(&phydev->mdio.bus->mdio_lock);
+	phy_lock_mdio_bus(phydev);
 	ret = __phy_read_mmd(phydev, devad, regnum);
-	mutex_unlock(&phydev->mdio.bus->mdio_lock);
+	phy_unlock_mdio_bus(phydev);
 
 	return ret;
 }
@@ -441,9 +441,9 @@ int phy_write_mmd(struct phy_device *phy
 {
 	int ret;
 
-	mutex_lock(&phydev->mdio.bus->mdio_lock);
+	phy_lock_mdio_bus(phydev);
 	ret = __phy_write_mmd(phydev, devad, regnum, val);
-	mutex_unlock(&phydev->mdio.bus->mdio_lock);
+	phy_unlock_mdio_bus(phydev);
 
 	return ret;
 }
@@ -497,9 +497,9 @@ int phy_modify_changed(struct phy_device
 {
 	int ret;
 
-	mutex_lock(&phydev->mdio.bus->mdio_lock);
+	phy_lock_mdio_bus(phydev);
 	ret = __phy_modify_changed(phydev, regnum, mask, set);
-	mutex_unlock(&phydev->mdio.bus->mdio_lock);
+	phy_unlock_mdio_bus(phydev);
 
 	return ret;
 }
@@ -541,9 +541,9 @@ int phy_modify(struct phy_device *phydev
 {
 	int ret;
 
-	mutex_lock(&phydev->mdio.bus->mdio_lock);
+	phy_lock_mdio_bus(phydev);
 	ret = __phy_modify(phydev, regnum, mask, set);
-	mutex_unlock(&phydev->mdio.bus->mdio_lock);
+	phy_unlock_mdio_bus(phydev);
 
 	return ret;
 }
@@ -600,9 +600,9 @@ int phy_modify_mmd_changed(struct phy_de
 {
 	int ret;
 
-	mutex_lock(&phydev->mdio.bus->mdio_lock);
+	phy_lock_mdio_bus(phydev);
 	ret = __phy_modify_mmd_changed(phydev, devad, regnum, mask, set);
-	mutex_unlock(&phydev->mdio.bus->mdio_lock);
+	phy_unlock_mdio_bus(phydev);
 
 	return ret;
 }
@@ -648,9 +648,9 @@ int phy_modify_mmd(struct phy_device *ph
 {
 	int ret;
 
-	mutex_lock(&phydev->mdio.bus->mdio_lock);
+	phy_lock_mdio_bus(phydev);
 	ret = __phy_modify_mmd(phydev, devad, regnum, mask, set);
-	mutex_unlock(&phydev->mdio.bus->mdio_lock);
+	phy_unlock_mdio_bus(phydev);
 
 	return ret;
 }
@@ -682,7 +682,7 @@ static int __phy_write_page(struct phy_d
  */
 int phy_save_page(struct phy_device *phydev)
 {
-	mutex_lock(&phydev->mdio.bus->mdio_lock);
+	phy_lock_mdio_bus(phydev);
 	return __phy_read_page(phydev);
 }
 EXPORT_SYMBOL_GPL(phy_save_page);
@@ -749,7 +749,7 @@ int phy_restore_page(struct phy_device *
 		ret = oldpage;
 	}
 
-	mutex_unlock(&phydev->mdio.bus->mdio_lock);
+	phy_unlock_mdio_bus(phydev);
 
 	return ret;
 }
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1070,6 +1070,16 @@ static inline const char *phydev_name(co
 	return dev_name(&phydev->mdio.dev);
 }
 
+static inline void phy_lock_mdio_bus(struct phy_device *phydev)
+{
+	mutex_lock(&phydev->mdio.bus->mdio_lock);
+}
+
+static inline void phy_unlock_mdio_bus(struct phy_device *phydev)
+{
+	mutex_unlock(&phydev->mdio.bus->mdio_lock);
+}
+
 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
 	__printf(2, 3);
 void phy_attached_info(struct phy_device *phydev);