tcp: Call gso_make_checksum

Call common gso_make_checksum when calculating checksum for a
TCP GSO segment.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 5 deletions

diff --git a/net/ipv4/tcp_offload.c b/net/ipv4/tcp_offload.c
index b92b81718ca4..d8de7b9e0720 100644
--- a/net/ipv4/tcp_offload.c
+++ b/net/ipv4/tcp_offload.c
@@ -97,9 +97,7 @@ struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
                 th->check = newcheck;
 
                 if (skb->ip_summed != CHECKSUM_PARTIAL)
-                        th->check =
-                             csum_fold(csum_partial(skb_transport_header(skb),
-                                                    thlen, skb->csum));
+                        th->check = gso_make_checksum(skb, ~th->check);
 
                 seq += mss;
                 if (copy_destructor) {
@@ -133,8 +131,7 @@ struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
         th->check = ~csum_fold((__force __wsum)((__force u32)th->check +
                                 (__force u32)delta));
         if (skb->ip_summed != CHECKSUM_PARTIAL)
-                th->check = csum_fold(csum_partial(skb_transport_header(skb),
-                                                   thlen, skb->csum));
+                th->check = gso_make_checksum(skb, ~th->check);
 out:
         return segs;
 }