[NET]: Make mangling a checksum (0 -> 0xffff on the wire) explicit.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index f9c4ed7207bb..dc19ba1e73b5 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -441,7 +441,7 @@ static void udp4_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb,
 
                 uh->check = csum_tcpudp_magic(src, dst, len, IPPROTO_UDP, csum);
                 if (uh->check == 0)
-                        uh->check = -1;
+                        uh->check = CSUM_MANGLED_0;
         }
 }
 
@@ -490,7 +490,7 @@ int udp_push_pending_frames(struct sock *sk, struct udp_sock *up)
         uh->check = csum_tcpudp_magic(fl->fl4_src, fl->fl4_dst, up->len,
                                       sk->sk_protocol, csum             );
         if (uh->check == 0)
-                uh->check = -1;
+                uh->check = CSUM_MANGLED_0;
 
 send:
         err = ip_push_pending_frames(sk);