net: ethernet: bcmgenet: fix fixed-link phydev leaks

Make sure to deregister and free any fixed-link PHY registered using
of_phy_register_fixed_link() on probe errors and on driver unbind.

Note that we're still leaking any fixed-link PHY registered in the
non-OF probe path.

Fixes: 9abf0c2b717a ("net: bcmgenet: use the new fixed PHY helpers")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/genet/bcmmii.c

@@ -627,6 +627,7 @@ static int bcmgenet_mii_bus_init(struct bcmgenet_priv *priv)
 int bcmgenet_mii_init(struct net_device *dev)
 {
 	struct bcmgenet_priv *priv = netdev_priv(dev);
+	struct device_node *dn = priv->pdev->dev.of_node;
 	int ret;
 
 	ret = bcmgenet_mii_alloc(priv);
@@ -640,6 +641,8 @@ int bcmgenet_mii_init(struct net_device *dev)
 	return 0;
 
 out:
+	if (of_phy_is_fixed_link(dn))
+		of_phy_deregister_fixed_link(dn);
 	of_node_put(priv->phy_dn);
 	mdiobus_unregister(priv->mii_bus);
 	mdiobus_free(priv->mii_bus);
@@ -649,7 +652,10 @@ out:
 void bcmgenet_mii_exit(struct net_device *dev)
 {
 	struct bcmgenet_priv *priv = netdev_priv(dev);
+	struct device_node *dn = priv->pdev->dev.of_node;
 
+	if (of_phy_is_fixed_link(dn))
+		of_phy_deregister_fixed_link(dn);
 	of_node_put(priv->phy_dn);
 	mdiobus_unregister(priv->mii_bus);
 	mdiobus_free(priv->mii_bus);