batman-adv: Fix change mac address of soft iface.

Into function interface_set_mac_addr, the function tt_local_add was
invoked before updating dev->dev_addr. The new MAC address was not
tagged as NoPurge.

Signed-off-by: Def <def@laposte.net>

diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 109ea2aae96cde266aef1123bb73a3fa7d219e79..21c53577c8d6a5e65599aa5c01d8d9d93c6fb838 100644 (file)
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -100,18 +100,21 @@ static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
 {
        struct batadv_priv *bat_priv = netdev_priv(dev);
        struct sockaddr *addr = p;
+       uint8_t old_addr[ETH_ALEN];
 
        if (!is_valid_ether_addr(addr->sa_data))
                return -EADDRNOTAVAIL;
 
+       memcpy(old_addr, dev->dev_addr, ETH_ALEN);
+       memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
+
        /* only modify transtable if it has been initialized before */
        if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_ACTIVE) {
-               batadv_tt_local_remove(bat_priv, dev->dev_addr,
+               batadv_tt_local_remove(bat_priv, old_addr,
                                       "mac address changed", false);
                batadv_tt_local_add(dev, addr->sa_data, BATADV_NULL_IFINDEX);
        }
 
-       memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
        dev->addr_assign_type &= ~NET_ADDR_RANDOM;
        return 0;
 }