1 files changed, 18 insertions, 0 deletions

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 5a886e6efbbe..a891133f00e4 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -496,6 +496,24 @@ void tcp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb)
         }
 }
 
+int tcp_v4_gso_send_check(struct sk_buff *skb)
+{
+        struct iphdr *iph;
+        struct tcphdr *th;
+
+        if (!pskb_may_pull(skb, sizeof(*th)))
+                return -EINVAL;
+
+        iph = skb->nh.iph;
+        th = skb->h.th;
+
+        th->check = 0;
+        th->check = ~tcp_v4_check(th, skb->len, iph->saddr, iph->daddr, 0);
+        skb->csum = offsetof(struct tcphdr, check);
+        skb->ip_summed = CHECKSUM_HW;
+        return 0;
+}
+
 /*
  *      This routine will send an RST to the other tcp.
  *