To prevent memory leakage on unbinding, add missing mdiobus unregister
and free calls.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 net/dsa/dsa.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 12cec40..91918a3 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -424,6 +424,8 @@ static void dsa_switch_destroy(struct dsa_switch *ds)
 	if (ds->hwmon_dev)
 		hwmon_device_unregister(ds->hwmon_dev);
 #endif
+	mdiobus_unregister(ds->slave_mii_bus);
+	mdiobus_free(ds->slave_mii_bus);
 }

 #ifdef CONFIG_PM_SLEEP
-- 
1.9.1