diff options
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/devinet.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index e92f1fd28aa5..5df2f6a0b0f0 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -1077,12 +1077,16 @@ static int inetdev_event(struct notifier_block *this, unsigned long event, ip_mc_up(in_dev); /* fall through */ case NETDEV_CHANGEADDR: - if (IN_DEV_ARP_NOTIFY(in_dev)) - arp_send(ARPOP_REQUEST, ETH_P_ARP, - in_dev->ifa_list->ifa_address, - dev, - in_dev->ifa_list->ifa_address, - NULL, dev->dev_addr, NULL); + /* Send gratuitous ARP to notify of link change */ + if (IN_DEV_ARP_NOTIFY(in_dev)) { + struct in_ifaddr *ifa = in_dev->ifa_list; + + if (ifa) + arp_send(ARPOP_REQUEST, ETH_P_ARP, + ifa->ifa_address, dev, + ifa->ifa_address, NULL, + dev->dev_addr, NULL); + } break; case NETDEV_DOWN: ip_mc_down(in_dev); |