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-rw-r--r--include/net/checksum.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/net/checksum.h b/include/net/checksum.h
index 0a55ac715..2d1d73cb7 100644
--- a/include/net/checksum.h
+++ b/include/net/checksum.h
@@ -122,7 +122,9 @@ static inline __wsum csum_partial_ext(const void *buff, int len, __wsum sum)
static inline void csum_replace4(__sum16 *sum, __be32 from, __be32 to)
{
- *sum = csum_fold(csum_add(csum_sub(~csum_unfold(*sum), from), to));
+ __wsum tmp = csum_sub(~csum_unfold(*sum), (__force __wsum)from);
+
+ *sum = csum_fold(csum_add(tmp, (__force __wsum)to));
}
/* Implements RFC 1624 (Incremental Internet Checksum)