[RFC PATCH net-next v2 03/10] net: phy: add mdiodev_lock() and mdiodev_unlock()

The __mdiodev_* accessors require the caller to hold the MDIO bus
lock, but the wrappers that take it, phy_lock_mdio_bus() and
phy_unlock_mdio_bus(), need a phy_device. A driver bound to a plain
MDIO device has none, and must reach into mdiodev->bus->mdio_lock
itself.

They sit in phy.h beside those wrappers because struct mii_bus is
defined here, not in mdio.h where the accessors live.

Assisted-by: LLM
Signed-off-by: Aleksei Sviridkin <redacted>
---
 include/linux/phy.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/phy.h b/include/linux/phy.h
index 3d8afe6b7f1c..8c10c8ae21b1 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h

@@ -2284,6 +2284,16 @@ static inline void phy_unlock_mdio_bus(struct phy_device *phydev)
 	mutex_unlock(&phydev->mdio.bus->mdio_lock);
 }
 
+static inline void mdiodev_lock(struct mdio_device *mdiodev)
+{
+	mutex_lock(&mdiodev->bus->mdio_lock);
+}
+
+static inline void mdiodev_unlock(struct mdio_device *mdiodev)
+{
+	mutex_unlock(&mdiodev->bus->mdio_lock);
+}
+
 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
 	__printf(2, 3);
 char *phy_attached_info_irq(struct phy_device *phydev)

-- 
2.53.0