2 files changed, 16 insertions, 11 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index fec8cf27f75d..d23972f56fc7 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1155,7 +1155,7 @@ EXPORT_SYMBOL(netif_device_attach);
 int skb_checksum_help(struct sk_buff *skb)
 {
         __wsum csum;
-        int ret = 0, offset = skb_transport_offset(skb);
+        int ret = 0, offset;
 
         if (skb->ip_summed == CHECKSUM_COMPLETE)
                 goto out_set_summed;
@@ -1171,15 +1171,16 @@ int skb_checksum_help(struct sk_buff *skb)
                         goto out;
         }
 
+        offset = skb->csum_start - skb_headroom(skb);
         BUG_ON(offset > (int)skb->len);
         csum = skb_checksum(skb, offset, skb->len-offset, 0);
 
-        offset = skb->tail - skb->transport_header;
+        offset = skb_headlen(skb) - offset;
         BUG_ON(offset <= 0);
         BUG_ON(skb->csum_offset + 2 > offset);
 
-        *(__sum16 *)(skb_transport_header(skb) +
-                     skb->csum_offset) = csum_fold(csum);
+        *(__sum16 *)(skb->head + skb->csum_start + skb->csum_offset) =
+                csum_fold(csum);
 out_set_summed:
         skb->ip_summed = CHECKSUM_NONE;
 out:
@@ -1431,12 +1432,16 @@ int dev_queue_xmit(struct sk_buff *skb)
         /* If packet is not checksummed and device does not support
          * checksumming for this protocol, complete checksumming here.
          */
-        if (skb->ip_summed == CHECKSUM_PARTIAL &&
-            (!(dev->features & NETIF_F_GEN_CSUM) &&
-             (!(dev->features & NETIF_F_IP_CSUM) ||
-              skb->protocol != htons(ETH_P_IP))))
-                if (skb_checksum_help(skb))
-                        goto out_kfree_skb;
+        if (skb->ip_summed == CHECKSUM_PARTIAL) {
+                skb_set_transport_header(skb, skb->csum_start -
+                                              skb_headroom(skb));
+
+                if (!(dev->features & NETIF_F_GEN_CSUM) &&
+                    (!(dev->features & NETIF_F_IP_CSUM) ||
+                     skb->protocol != htons(ETH_P_IP)))
+                        if (skb_checksum_help(skb))
+                                goto out_kfree_skb;
+        }
 
 gso:
         spin_lock_prefetch(&dev->queue_lock);
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 4965df29768b..52a4fdd4f31c 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1358,7 +1358,7 @@ void skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to)
         long csstart;
 
         if (skb->ip_summed == CHECKSUM_PARTIAL)
-                csstart = skb_transport_offset(skb);
+                csstart = skb->csum_start - skb_headroom(skb);
         else
                 csstart = skb_headlen(skb);