net: fix inet_proto_csum_replace4() sparse errors

make C=2 CF=-D__CHECK_ENDIAN__ net/core/utils.o
...
net/core/utils.c:307:72: warning: incorrect type in argument 2 (different base types)
net/core/utils.c:307:72:    expected restricted __wsum [usertype] addend
net/core/utils.c:307:72:    got restricted __be32 [usertype] from
net/core/utils.c:308:34: warning: incorrect type in argument 2 (different base types)
net/core/utils.c:308:34:    expected restricted __wsum [usertype] addend
net/core/utils.c:308:34:    got restricted __be32 [usertype] to
net/core/utils.c:310:70: warning: incorrect type in argument 2 (different base types)
net/core/utils.c:310:70:    expected restricted __wsum [usertype] addend
net/core/utils.c:310:70:    got restricted __be32 [usertype] from
net/core/utils.c:310:77: warning: incorrect type in argument 2 (different base types)
net/core/utils.c:310:77:    expected restricted __wsum [usertype] addend
net/core/utils.c:310:77:    got restricted __be32 [usertype] to
net/core/utils.c:312:72: warning: incorrect type in argument 2 (different base types)
net/core/utils.c:312:72:    expected restricted __wsum [usertype] addend
net/core/utils.c:312:72:    got restricted __be32 [usertype] from
net/core/utils.c:313:35: warning: incorrect type in argument 2 (different base types)
net/core/utils.c:313:35:    expected restricted __wsum [usertype] addend
net/core/utils.c:313:35:    got restricted __be32 [usertype] to

Note we can use csum_replace4() helper

Fixes: 58e3cac5613aa ("net: optimise inet_proto_csum_replace4()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 5 deletions

diff --git a/net/core/utils.c b/net/core/utils.c
index 7b803884c162..a7732a068043 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -304,13 +304,15 @@ void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
                               __be32 from, __be32 to, int pseudohdr)
 {
         if (skb->ip_summed != CHECKSUM_PARTIAL) {
-                *sum = csum_fold(csum_add(csum_sub(~csum_unfold(*sum), from),
-                                 to));
+                csum_replace4(sum, from, to);
                 if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)
-                        skb->csum = ~csum_add(csum_sub(~(skb->csum), from), to);
+                        skb->csum = ~csum_add(csum_sub(~(skb->csum),
+                                                       (__force __wsum)from),
+                                              (__force __wsum)to);
         } else if (pseudohdr)
-                *sum = ~csum_fold(csum_add(csum_sub(csum_unfold(*sum), from),
-                                  to));
+                *sum = ~csum_fold(csum_add(csum_sub(csum_unfold(*sum),
+                                                    (__force __wsum)from),
+                                           (__force __wsum)to));
 }
 EXPORT_SYMBOL(inet_proto_csum_replace4);