netfilter: xtables: change matches to return error code

The following semantic patch does part of the transformation:
// <smpl>
@ rule1 @
struct xt_match ops;
identifier check;
@@
 ops.checkentry = check;

@@
identifier rule1.check;
@@
 check(...) { <...
-return true;
+return 0;
 ...> }

@@
identifier rule1.check;
@@
 check(...) { <...
-return false;
+return -EINVAL;
 ...> }
// </smpl>

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/netfilter/xt_dscp.c b/net/netfilter/xt_dscp.c
index 295da4ce822..f355fb9e06f 100644
--- a/net/netfilter/xt_dscp.c
+++ b/net/netfilter/xt_dscp.c
@@ -48,10 +48,10 @@ static int dscp_mt_check(const struct xt_mtchk_param *par)
 
 	if (info->dscp > XT_DSCP_MAX) {
 		pr_info("dscp %x out of range\n", info->dscp);
-		return false;
+		return -EINVAL;
 	}
 
-	return true;
+	return 0;
 }
 
 static bool tos_mt(const struct sk_buff *skb, const struct xt_match_param *par)