diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 522cbe6a0b23e13be0e2cf83fb03f3722401326b..902e1c88ef5854e2ca08c486a204090de54caa4a 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -1008,6 +1008,33 @@ int mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum)
 }
 EXPORT_SYMBOL(mdiobus_c45_read);
 
+/**
+ * mdiobus_c45_read_nested - Nested version of the mdiobus_c45_read function
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to read
+ *
+ * In case of nested MDIO bus access avoid lockdep false positives by
+ * using mutex_lock_nested().
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int mdiobus_c45_read_nested(struct mii_bus *bus, int addr, int devad,
+			    u32 regnum)
+{
+	int retval;
+
+	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+	retval = __mdiobus_c45_read(bus, addr, devad, regnum);
+	mutex_unlock(&bus->mdio_lock);
+
+	return retval;
+}
+EXPORT_SYMBOL(mdiobus_c45_read_nested);
+
 /**
  * mdiobus_write_nested - Nested version of the mdiobus_write function
  * @bus: the mii_bus struct
@@ -1082,6 +1109,34 @@ int mdiobus_c45_write(struct mii_bus *bus, int addr, int devad, u32 regnum,
 }
 EXPORT_SYMBOL(mdiobus_c45_write);
 
+/**
+ * mdiobus_c45_write_nested - Nested version of the mdiobus_c45_write function
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to write
+ * @val: value to write to @regnum
+ *
+ * In case of nested MDIO bus access avoid lockdep false positives by
+ * using mutex_lock_nested().
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int mdiobus_c45_write_nested(struct mii_bus *bus, int addr, int devad,
+			     u32 regnum, u16 val)
+{
+	int err;
+
+	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+	err = __mdiobus_c45_write(bus, addr, devad, regnum, val);
+	mutex_unlock(&bus->mdio_lock);
+
+	return err;
+}
+EXPORT_SYMBOL(mdiobus_c45_write_nested);
+
 /**
  * mdiobus_modify - Convenience function for modifying a given mdio device
  *	register
diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index 97b49765e8b5b7e1ccd2d96e52b1cbe8bc6c4ae0..220f3ca8702d596e3897a70f8607f3f12871c909 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -425,10 +425,14 @@ int mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
 			   u16 mask, u16 set);
 int __mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum);
 int mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum);
+int mdiobus_c45_read_nested(struct mii_bus *bus, int addr, int devad,
+			     u32 regnum);
 int __mdiobus_c45_write(struct mii_bus *bus, int addr,  int devad, u32 regnum,
 			u16 val);
 int mdiobus_c45_write(struct mii_bus *bus, int addr,  int devad, u32 regnum,
 		      u16 val);
+int mdiobus_c45_write_nested(struct mii_bus *bus, int addr,  int devad,
+			     u32 regnum, u16 val);
 int mdiobus_c45_modify(struct mii_bus *bus, int addr, int devad, u32 regnum,
 		       u16 mask, u16 set);