net: ethernet: renesas: ravb: fix fixed-link phydev leaks

Make sure to deregister and free any fixed-link PHY registered using
of_phy_register_fixed_link() on initialisation errors and on device
close after having disconnected the PHY.

Fixes: b4bc88a8 ("ravb: Add fixed-link support")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/renesas/ravb_main.c

@@ -1008,7 +1008,8 @@ static int ravb_phy_init(struct net_device *ndev)
 	of_node_put(pn);
 	if (!phydev) {
 		netdev_err(ndev, "failed to connect PHY\n");
-		return -ENOENT;
+		err = -ENOENT;
+		goto err_deregister_fixed_link;
 	}
 
 	/* This driver only support 10/100Mbit speeds on Gen3
@@ -1020,8 +1021,7 @@ static int ravb_phy_init(struct net_device *ndev)
 		err = phy_set_max_speed(phydev, SPEED_100);
 		if (err) {
 			netdev_err(ndev, "failed to limit PHY to 100Mbit/s\n");
-			phy_disconnect(phydev);
-			return err;
+			goto err_phy_disconnect;
 		}
 
 		netdev_info(ndev, "limited PHY to 100Mbit/s\n");
@@ -1033,6 +1033,14 @@ static int ravb_phy_init(struct net_device *ndev)
 	phy_attached_info(phydev);
 
 	return 0;
+
+err_phy_disconnect:
+	phy_disconnect(phydev);
+err_deregister_fixed_link:
+	if (of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
+
+	return err;
 }
 
 /* PHY control start function */
@@ -1634,6 +1642,7 @@ static void ravb_set_rx_mode(struct net_device *ndev)
 /* Device close function for Ethernet AVB */
 static int ravb_close(struct net_device *ndev)
 {
+	struct device_node *np = ndev->dev.parent->of_node;
 	struct ravb_private *priv = netdev_priv(ndev);
 	struct ravb_tstamp_skb *ts_skb, *ts_skb2;
 
@@ -1663,6 +1672,8 @@ static int ravb_close(struct net_device *ndev)
 	if (ndev->phydev) {
 		phy_stop(ndev->phydev);
 		phy_disconnect(ndev->phydev);
+		if (of_phy_is_fixed_link(np))
+			of_phy_deregister_fixed_link(np);
 	}
 
 	if (priv->chip_id != RCAR_GEN2) {