datapath:compat: Fix build failure on old kernels.

[cascardo/ovs.git] / datapath / linux / compat / gre.c

diff --git a/datapath/linux/compat/gre.c b/datapath/linux/compat/gre.c
index c7f2551..1cd885b 100644 (file)
--- a/datapath/linux/compat/gre.c
+++ b/datapath/linux/compat/gre.c
@@ -292,6 +292,11 @@ struct sk_buff *gre_handle_offloads(struct sk_buff *skb, bool gre_csum)
        skb_reset_inner_headers(skb);
 
        if (skb_is_gso(skb)) {
+               if (skb_is_encapsulated(skb)) {
+                       err = -ENOSYS;
+                       goto error;
+               }
+
                if (gre_csum)
                        OVS_GSO_CB(skb)->fix_segment = gre_csum_fix;
                else