ipv4: fix NULL checking in devinet_ioctl()

The NULL pointer check `!ifa' should come before its first use.

[ Bug origin : commit fd23c3b31107e2fc483301ee923d8a1db14e53f4
  (ipv4: Add hash table of interface addresses) in linux-2.6.39 ]

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index cc06a47f1216..a8e4f2665d5e 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -823,9 +823,9 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
                 if (!ifa) {
                         ret = -ENOBUFS;
                         ifa = inet_alloc_ifa();
-                        INIT_HLIST_NODE(&ifa->hash);
                         if (!ifa)
                                 break;
+                        INIT_HLIST_NODE(&ifa->hash);
                         if (colon)
                                 memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ);
                         else