checkpatch: reduce false positives when checking void function return statements

The previous patch had a few too many false positives on styles that
should be acceptable.

Signed-off-by: Joe Perches <joe@perches.com>
Tested-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 10 insertions, 5 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 010b18ef4ea0..182be0f12407 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3476,12 +3476,17 @@ sub process {
                         }
                 }
 
-# unnecessary return in a void function? (a single leading tab, then return;)
-                if ($sline =~ /^\+\treturn\s*;\s*$/ &&
-                    $prevline =~ /^\+/) {
+# unnecessary return in a void function
+# at end-of-function, with the previous line a single leading tab, then return;
+# and the line before that not a goto label target like "out:"
+                if ($sline =~ /^[ \+]}\s*$/ &&
+                    $prevline =~ /^\+\treturn\s*;\s*$/ &&
+                    $linenr >= 3 &&
+                    $lines[$linenr - 3] =~ /^[ +]/ &&
+                    $lines[$linenr - 3] !~ /^[ +]\s*$Ident\s*:/) {
                         WARN("RETURN_VOID",
-                             "void function return statements are not generally useful\n" . $herecurr);
-                }
+                             "void function return statements are not generally useful\n" . $hereprev);
+               }
 
 # if statements using unnecessary parentheses - ie: if ((foo == bar))
                 if ($^V && $^V ge 5.10.0 &&