From: Joe Perches <joe@perches.com>
Date: Thu, 16 Apr 2015 19:44:19 +0000 (-0700)
Subject: checkpatch: improve return negative errno check
X-Git-Tag: v4.9.8~4433^2~113
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f34e4a4f979c0d39f741bc809127fcf2167a7389;p=platform%2Fkernel%2Flinux-rpi3.git

checkpatch: improve return negative errno check

Add a few conditions to the test to find
	return (ERRNO);

Make the output message a bit less cryptic too.

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

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 5748c35..45babf2 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4009,12 +4009,12 @@ sub process {
 			}
 		}
 
-# Return of what appears to be an errno should normally be -'ve
-		if ($line =~ /^.\s*return\s*(E[A-Z]*)\s*;/) {
+# Return of what appears to be an errno should normally be negative
+		if ($sline =~ /\breturn(?:\s*\(+\s*|\s+)(E[A-Z]+)(?:\s*\)+\s*|\s*)[;:,]/) {
 			my $name = $1;
 			if ($name ne 'EOF' && $name ne 'ERROR') {
 				WARN("USE_NEGATIVE_ERRNO",
-				     "return of an errno should typically be -ve (return -$1)\n" . $herecurr);
+				     "return of an errno should typically be negative (ie: return -$1)\n" . $herecurr);
 			}
 		}