netfilter: xtables: untangle spaghetti if clauses in checkentry

As I'm changing the return values soon, I want to have a clear visual
path.

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

1 files changed, 7 insertions, 3 deletions

diff --git a/net/netfilter/xt_dccp.c b/net/netfilter/xt_dccp.c
index 0989f29ade2..8f6014f7c88 100644
--- a/net/netfilter/xt_dccp.c
+++ b/net/netfilter/xt_dccp.c
@@ -127,9 +127,13 @@ static bool dccp_mt_check(const struct xt_mtchk_param *par)
 {
         const struct xt_dccp_info *info = par->matchinfo;
 
-        return !(info->flags & ~XT_DCCP_VALID_FLAGS)
-                && !(info->invflags & ~XT_DCCP_VALID_FLAGS)
-                && !(info->invflags & ~info->flags);
+        if (info->flags & ~XT_DCCP_VALID_FLAGS)
+                return false;
+        if (info->invflags & ~XT_DCCP_VALID_FLAGS)
+                return false;
+        if (info->invflags & ~info->flags)
+                return false;
+        return true;
 }
 
 static struct xt_match dccp_mt_reg[] __read_mostly = {