[PATCH net 13/16] net: ethernet: renesas: ravb: fix fixed-link phydev leaks

[Johan Hovold]

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: b4bc88a868ed ("ravb: Add fixed-link support")
Signed-off-by: Johan Hovold <jo...@kernel.org>
---
 drivers/net/ethernet/renesas/ravb_main.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/renesas/ravb_main.c 
b/drivers/net/ethernet/renesas/ravb_main.c
index 630536bc72f9..f1f3be2cfe21 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/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) {
-- 
2.7.3