net: phy: add helpers phy_(un)lock_mdio_bus

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>

drivers/net/phy/phy-core.c

@@ -419,9 +419,9 @@ int phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum)
 {
 	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;
 }
@@ -480,9 +480,9 @@ int phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val)
 {
 	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;
 }
@@ -536,9 +536,9 @@ int phy_modify_changed(struct phy_device *phydev, u32 regnum, u16 mask, u16 set)
 {
 	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;
 }
@@ -580,9 +580,9 @@ int phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set)
 {
 	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;
 }
@@ -639,9 +639,9 @@ int phy_modify_mmd_changed(struct phy_device *phydev, int devad, u32 regnum,
 {
 	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;
 }
@@ -687,9 +687,9 @@ int phy_modify_mmd(struct phy_device *phydev, int devad, u32 regnum,
 {
 	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;
 }
@@ -721,7 +721,7 @@ static int __phy_write_page(struct phy_device *phydev, int page)
  */
 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);
@@ -788,7 +788,7 @@ int phy_restore_page(struct phy_device *phydev, int oldpage, int ret)
 		ret = oldpage;
 	}
 
-	mutex_unlock(&phydev->mdio.bus->mdio_lock);
+	phy_unlock_mdio_bus(phydev);
 
 	return ret;
 }

include/linux/phy.h

@@ -1076,6 +1076,16 @@ static inline const char *phydev_name(const struct phy_device *phydev)
 	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);