Please test to check that this addresses your issue. Thanks.

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 6cf73c15635b..afbad1ad8683 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c

@@ -193,6 +193,10 @@ static void mdiobus_release(struct device *d)
             bus->state != MDIOBUS_ALLOCATED,
             "%s: not in RELEASED or ALLOCATED state\n",
             bus->id);
+
+       if (bus->state == MDIOBUS_RELEASED)
+               fwnode_handle_put(dev_fwnode(d));
+
        kfree(bus);
 }

@@ -684,6 +688,15 @@ int __mdiobus_register(struct mii_bus *bus, struct module *owner)
        bus->dev.groups = NULL;
        dev_set_name(&bus->dev, "%s", bus->id);

+       /* If the bus state is allocated, we're registering a fresh bus
+        * that may have a fwnode associated with it. Grab a reference
+        * to the fwnode. This will be dropped when the bus is released.
+        * If the bus was set to unregistered, it means that the bus was
+        * previously registered, and we've already grabbed a reference.
+        */
+       if (bus->state == MDIOBUS_ALLOCATED)
+               fwnode_handle_get(dev_fwnode(&bus->dev));
+
        /* We need to set state to MDIOBUS_UNREGISTERED to correctly release
         * the device in mdiobus_free()
         *
--