[IPV6]: Don't redo xfrm_lookup for cached dst entries

The xfrm lookup is already done when the dst entry is looked up first and
stored in the cache.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 3 deletions

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 09613729404c..cf94372d1af3 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -673,11 +673,12 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
 
         if ((dst = ip6_tnl_dst_check(t)) != NULL)
                 dst_hold(dst);
-        else
+        else {
                 dst = ip6_route_output(NULL, &fl);
 
-        if (dst->error || xfrm_lookup(&dst, &fl, NULL, 0) < 0)
-                goto tx_err_link_failure;
+                if (dst->error || xfrm_lookup(&dst, &fl, NULL, 0) < 0)
+                        goto tx_err_link_failure;
+        }
 
         tdev = dst->dev;