Clang produces the following warning:
net/ipv4/netfilter/nf_nat_h323.c:553:6: error:
logical not is only applied to the left hand side of this comparison
[-Werror,-Wlogical-not-parentheses]
if (!set_h225_addr(skb, protoff, data, dataoff, taddr,
^
add parentheses after the '!' to evaluate the comparison first
add parentheses around left hand side expression to silence this warning
There's not necessarily a bug here, but it's cleaner to use the form:
if (x != 0)
rather than:
if (!x == 0)
Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
---
Also, it's even cleaner to use the form:
if (x)
but then if the return codes change from treating 0 as success (unlikely),
then all call sites must be updated.
I'm happy to send v2 that changes to that form, and updates the other call
sites to be:
if (set_h225_addr())
handle_failures()
else
handle_success()
net/ipv4/netfilter/nf_nat_h323.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/net/ipv4/netfilter/nf_nat_h323.c b/net/ipv4/netfilter/nf_nat_h323.c
index 574f7ebba0b6..d8fb251fa6e3 100644
--- a/net/ipv4/netfilter/nf_nat_h323.c
+++ b/net/ipv4/netfilter/nf_nat_h323.c
@@ -550,9 +550,9 @@ static int nat_callforwarding(struct sk_buff *skb, struct nf_conn *ct,
}
/* Modify signal */
- if (!set_h225_addr(skb, protoff, data, dataoff, taddr,
- &ct->tuplehash[!dir].tuple.dst.u3,
- htons(nated_port)) == 0) {
+ if (set_h225_addr(skb, protoff, data, dataoff, taddr,
+ &ct->tuplehash[!dir].tuple.dst.u3,
+ htons(nated_port)) != 0) {
nf_ct_unexpect_related(exp);
return -1;
}
--
2.14.0.rc0.400.g1c36432dff-goog
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