[PATCH net 16/16] net: dsa: slave: 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 slave-setup errors and on slave destroy.

Fixes: 0d8bcdd383b8 ("net: dsa: allow for more complex PHY setups")
Signed-off-by: Johan Hovold <jo...@kernel.org>
---
 net/dsa/slave.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 2a5c20a13fe4..30e2e21d7619 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -1177,6 +1177,8 @@ static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
                ret = dsa_slave_phy_connect(p, slave_dev, p->port);
                if (ret) {
                        netdev_err(slave_dev, "failed to connect to port %d: 
%d\n", p->port, ret);
+                       if (phy_is_fixed)
+                               of_phy_deregister_fixed_link(port_dn);
                        return ret;
                }
        }
@@ -1292,10 +1294,18 @@ int dsa_slave_create(struct dsa_switch *ds, struct 
device *parent,
 void dsa_slave_destroy(struct net_device *slave_dev)
 {
        struct dsa_slave_priv *p = netdev_priv(slave_dev);
+       struct dsa_switch *ds = p->parent;
+       struct device_node *port_dn;
+
+       port_dn = ds->ports[p->port].dn;
 
        netif_carrier_off(slave_dev);
-       if (p->phy)
+       if (p->phy) {
                phy_disconnect(p->phy);
+
+               if (of_phy_is_fixed_link(port_dn))
+                       of_phy_deregister_fixed_link(port_dn);
+       }
        unregister_netdev(slave_dev);
        free_netdev(slave_dev);
 }
-- 
2.7.3