sunvnet: clean up objects created in vnet_new() on vnet_exit()

Nothing cleans up the objects created by
vnet_new(), they are completely leaked.

vnet_exit(), after doing the vio_unregister_driver() to clean
up ports, should call a helper function that iterates over vnet_list
and cleans up those objects. This includes unregister_netdevice()
as well as free_netdev().

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Reviewed-by: Karl Volz <karl.volz@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c
index 1c24a8f368bd86a25835053de21ee6f96df78adb..fd411d6e19a2f4e4d37675f1d27bd011584b8fa0 100644 (file)
--- a/drivers/net/ethernet/sun/sunvnet.c
+++ b/drivers/net/ethernet/sun/sunvnet.c
@@ -1083,6 +1083,24 @@ static struct vnet *vnet_find_or_create(const u64 *local_mac)
        return vp;
 }
 
+static void vnet_cleanup(void)
+{
+       struct vnet *vp;
+       struct net_device *dev;
+
+       mutex_lock(&vnet_list_mutex);
+       while (!list_empty(&vnet_list)) {
+               vp = list_first_entry(&vnet_list, struct vnet, list);
+               list_del(&vp->list);
+               dev = vp->dev;
+               /* vio_unregister_driver() should have cleaned up port_list */
+               BUG_ON(!list_empty(&vp->port_list));
+               unregister_netdev(dev);
+               free_netdev(dev);
+       }
+       mutex_unlock(&vnet_list_mutex);
+}
+
 static const char *local_mac_prop = "local-mac-address";
 
 static struct vnet *vnet_find_parent(struct mdesc_handle *hp,
@@ -1240,7 +1258,6 @@ static int vnet_port_remove(struct vio_dev *vdev)
 
                kfree(port);
 
-               unregister_netdev(vp->dev);
        }
        return 0;
 }
@@ -1268,6 +1285,7 @@ static int __init vnet_init(void)
 static void __exit vnet_exit(void)
 {
        vio_unregister_driver(&vnet_port_driver);
+       vnet_cleanup();
 }
 
 module_init(vnet_init);