[PATCH net-next] ip_tunnel: do not clear l4 hashes

[Eric Dumazet]

From: Eric Dumazet <eduma...@google.com>

If skb has a valid l4 hash, there is no point clearing hash and force
a further flow dissection when a tunnel encapsulation is added.

Signed-off-by: Eric Dumazet <eduma...@google.com>
---
 net/ipv4/ip_tunnel_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 0f227db0e9ac..777bc1883870 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -69,7 +69,7 @@ void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct 
sk_buff *skb,
 
        skb_scrub_packet(skb, xnet);
 
-       skb_clear_hash(skb);
+       skb_clear_hash_if_not_l4(skb);
        skb_dst_set(skb, &rt->dst);
        memset(IPCB(skb), 0, sizeof(*IPCB(skb)));