[NET]: Annotate callers of csum_fold() in net/*

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 3 deletions

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index dadef867a3bb..168f9de906bc 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2162,7 +2162,7 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features)
         struct tcphdr *th;
         unsigned thlen;
         unsigned int seq;
-        unsigned int delta;
+        __be32 delta;
         unsigned int oldlen;
         unsigned int len;
 
@@ -2215,7 +2215,8 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features)
         do {
                 th->fin = th->psh = 0;
 
-                th->check = ~csum_fold(th->check + delta);
+                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->h.raw, thlen,
                                                            skb->csum));
@@ -2229,7 +2230,8 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features)
         } while (skb->next);
 
         delta = htonl(oldlen + (skb->tail - skb->h.raw) + skb->data_len);
-        th->check = ~csum_fold(th->check + delta);
+        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->h.raw, thlen,
                                                    skb->csum));