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-rw-r--r--net/core/utils.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/net/core/utils.c b/net/core/utils.c
index eed3433..efc76dd 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -306,16 +306,14 @@ EXPORT_SYMBOL(in6_pton);
void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
__be32 from, __be32 to, int pseudohdr)
{
- __be32 diff[] = { ~from, to };
if (skb->ip_summed != CHECKSUM_PARTIAL) {
- *sum = csum_fold(csum_partial(diff, sizeof(diff),
- ~csum_unfold(*sum)));
+ *sum = csum_fold(csum_add(csum_sub(~csum_unfold(*sum), from),
+ to));
if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)
- skb->csum = ~csum_partial(diff, sizeof(diff),
- ~skb->csum);
+ skb->csum = ~csum_add(csum_sub(~(skb->csum), from), to);
} else if (pseudohdr)
- *sum = ~csum_fold(csum_partial(diff, sizeof(diff),
- csum_unfold(*sum)));
+ *sum = ~csum_fold(csum_add(csum_sub(csum_unfold(*sum), from),
+ to));
}
EXPORT_SYMBOL(inet_proto_csum_replace4);