Merge branch 'linux-linaro-lsk' into linux-linaro-lsk-android

[firefly-linux-kernel-4.4.55.git] / net / ipv4 / route.c

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index bea0e1f2df0e5f2d9e4e0edbbc3ec129cee69e05..d843cfa1137e997642d359ff7d85dbf39af5ee0d 100644 (file)
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -992,20 +992,21 @@ void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu)
        const struct iphdr *iph = (const struct iphdr *) skb->data;
        struct flowi4 fl4;
        struct rtable *rt;
-       struct dst_entry *dst;
+       struct dst_entry *odst = NULL;
        bool new = false;
 
        bh_lock_sock(sk);
-       rt = (struct rtable *) __sk_dst_get(sk);
+       odst = sk_dst_get(sk);
 
-       if (sock_owned_by_user(sk) || !rt) {
+       if (sock_owned_by_user(sk) || !odst) {
                __ipv4_sk_update_pmtu(skb, sk, mtu);
                goto out;
        }
 
        __build_flow_key(&fl4, sk, iph, 0, 0, 0, 0, 0);
 
-       if (!__sk_dst_check(sk, 0)) {
+       rt = (struct rtable *)odst;
+       if (odst->obsolete && odst->ops->check(odst, 0) == NULL) {
                rt = ip_route_output_flow(sock_net(sk), &fl4, sk);
                if (IS_ERR(rt))
                        goto out;
@@ -1015,8 +1016,7 @@ void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu)
 
        __ip_rt_update_pmtu((struct rtable *) rt->dst.path, &fl4, mtu);
 
-       dst = dst_check(&rt->dst, 0);
-       if (!dst) {
+       if (!dst_check(&rt->dst, 0)) {
                if (new)
                        dst_release(&rt->dst);
 
@@ -1028,10 +1028,11 @@ void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu)
        }
 
        if (new)
-               __sk_dst_set(sk, &rt->dst);
+               sk_dst_set(sk, &rt->dst);
 
 out:
        bh_unlock_sock(sk);
+       dst_release(odst);
 }
 EXPORT_SYMBOL_GPL(ipv4_sk_update_pmtu);