[NET]: Treat CHECKSUM_PARTIAL as CHECKSUM_UNNECESSARY

When a transmitted packet is looped back directly, CHECKSUM_PARTIAL
maps to the semantics of CHECKSUM_UNNECESSARY.  Therefore we should
treat it as such in the stack.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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 5ad7a26e3091..cec0f2cc49b7 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -848,7 +848,7 @@ try_again:
                         goto csum_copy_err;
         }
 
-        if (skb->ip_summed == CHECKSUM_UNNECESSARY)
+        if (skb_csum_unnecessary(skb))
                 err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr),
                                               msg->msg_iov, copied       );
         else {
@@ -1190,7 +1190,7 @@ static inline int udp4_csum_init(struct sk_buff *skb, struct udphdr *uh,
                                       proto, skb->csum))
                         skb->ip_summed = CHECKSUM_UNNECESSARY;
         }
-        if (skb->ip_summed != CHECKSUM_UNNECESSARY)
+        if (!skb_csum_unnecessary(skb))
                 skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr,
                                                skb->len, proto, 0);
         /* Probably, we should checksum udp header (it should be in cache