[PATCH net-next] net: phy: replace mutex_is_locked with lockdep_assert_held in phylib

[Heiner Kallweit]

Switch to lockdep_assert_held(_once), similar to what is being done
in other subsystems. One advantage is that there's zero runtime
overhead if lockdep support isn't enabled.

Signed-off-by: Heiner Kallweit <hkallwe...@gmail.com>
---
 drivers/net/phy/mdio_bus.c   | 4 ++--
 drivers/net/phy/phy.c        | 2 +-
 drivers/net/phy/phy_device.c | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 2b42e4606..040509b81 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -740,7 +740,7 @@ int __mdiobus_read(struct mii_bus *bus, int addr, u32 
regnum)
 {
        int retval;
 
-       WARN_ON_ONCE(!mutex_is_locked(&bus->mdio_lock));
+       lockdep_assert_held_once(&bus->mdio_lock);
 
        retval = bus->read(bus, addr, regnum);
 
@@ -766,7 +766,7 @@ int __mdiobus_write(struct mii_bus *bus, int addr, u32 
regnum, u16 val)
 {
        int err;
 
-       WARN_ON_ONCE(!mutex_is_locked(&bus->mdio_lock));
+       lockdep_assert_held_once(&bus->mdio_lock);
 
        err = bus->write(bus, addr, regnum, val);
 
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 45f75533c..9cb7e4dbf 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -724,7 +724,7 @@ static int phy_check_link_status(struct phy_device *phydev)
 {
        int err;
 
-       WARN_ON(!mutex_is_locked(&phydev->lock));
+       lockdep_assert_held(&phydev->lock);
 
        /* Keep previous state if loopback is enabled because some PHYs
         * report that Link is Down when loopback is enabled.
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 80c2e646c..8447e56ba 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1740,7 +1740,7 @@ int __phy_resume(struct phy_device *phydev)
        struct phy_driver *phydrv = phydev->drv;
        int ret;
 
-       WARN_ON(!mutex_is_locked(&phydev->lock));
+       lockdep_assert_held(&phydev->lock);
 
        if (!phydrv || !phydrv->resume)
                return 0;
-- 
2.30.0