diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index e5c25beae21e..931b9a6c5dc5 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -565,6 +565,9 @@ int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum)
 
 	WARN_ON_ONCE(!mutex_is_locked(&bus->mdio_lock));
 
+	if (addr >= PHY_MAX_ADDR)
+		return -ENXIO;
+
 	if (bus->read)
 		retval = bus->read(bus, addr, regnum);
 	else
@@ -593,6 +596,9 @@ int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val)
 
 	WARN_ON_ONCE(!mutex_is_locked(&bus->mdio_lock));
 
+	if (addr >= PHY_MAX_ADDR)
+		return -ENXIO;
+
 	if (bus->write)
 		err = bus->write(bus, addr, regnum, val);
 	else