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authorDavid S. Miller <davem@davemloft.net>2009-10-11 23:15:47 -0700
committerDavid S. Miller <davem@davemloft.net>2009-10-11 23:15:47 -0700
commit7fe13c5733790ef582769a54693fa6a5abf3c032 (patch)
tree567eb4394b642ddc81ff05521329d75d1cf47b88 /net/ipv4
parent8aa0f64ac3835a6daf84d0b0e07c4c01d7d8eddc (diff)
parent10c435f18b8cb78a5870c08d52955594f5ec9c31 (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/devinet.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index e92f1fd28aa..5df2f6a0b0f 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);