1 files changed, 12 insertions, 13 deletions

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 5ef4da780ac1..d0ef0e674ec5 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -735,7 +735,7 @@ drop:
         return 0;
 }
 
-static struct sk_buff *handle_offloads(struct sk_buff *skb)
+static struct sk_buff *handle_offloads(struct ip_tunnel *tunnel, struct sk_buff *skb)
 {
         int err;
 
@@ -745,8 +745,12 @@ static struct sk_buff *handle_offloads(struct sk_buff *skb)
                         goto error;
                 skb_shinfo(skb)->gso_type |= SKB_GSO_GRE;
                 return skb;
-        }
-        if (skb->ip_summed != CHECKSUM_PARTIAL)
+        } else if (skb->ip_summed == CHECKSUM_PARTIAL &&
+                   tunnel->parms.o_flags&GRE_CSUM) {
+                err = skb_checksum_help(skb);
+                if (unlikely(err))
+                        goto error;
+        } else if (skb->ip_summed != CHECKSUM_PARTIAL)
                 skb->ip_summed = CHECKSUM_NONE;
 
         return skb;
@@ -776,7 +780,7 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
         int    err;
         int    pkt_len;
 
-        skb = handle_offloads(skb);
+        skb = handle_offloads(tunnel, skb);
         if (IS_ERR(skb)) {
                 dev->stats.tx_dropped++;
                 return NETDEV_TX_OK;
@@ -970,7 +974,8 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
         iph->daddr              =       fl4.daddr;
         iph->saddr              =       fl4.saddr;
         iph->ttl                =       ttl;
-        iph->id                 =       0;
+
+        tunnel_ip_select_ident(skb, old_iph, &rt->dst);
 
         if (ttl == 0) {
                 if (skb->protocol == htons(ETH_P_IP))
@@ -1101,14 +1106,8 @@ static int ipgre_tunnel_bind_dev(struct net_device *dev)
         tunnel->hlen = addend;
         /* TCP offload with GRE SEQ is not supported. */
         if (!(tunnel->parms.o_flags & GRE_SEQ)) {
-                /* device supports enc gso offload*/
-                if (tdev->hw_enc_features & NETIF_F_GRE_GSO) {
-                        dev->features           |= NETIF_F_TSO;
-                        dev->hw_features        |= NETIF_F_TSO;
-                } else {
-                        dev->features           |= NETIF_F_GSO_SOFTWARE;
-                        dev->hw_features        |= NETIF_F_GSO_SOFTWARE;
-                }
+                dev->features           |= NETIF_F_GSO_SOFTWARE;
+                dev->hw_features        |= NETIF_F_GSO_SOFTWARE;
         }
 
         return mtu;