[PATCH] scripts: checkpatch: ignore stable commit annotation

[Felipe Balbi <balbi@ti.com>]

When running scripts/checkpatch.pl on stable commits,
we always get the error for not using 12-character
commit hash abbreviation with shortlog within ("").

Because that's actually a false positive, let's ignore
stable commit annotation.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 scripts/checkpatch.pl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 90e1edc8dd42..2ad0ef46ad08 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2320,6 +2320,7 @@ sub process {
 		if ($in_commit_log && $line =~ /\b(c)ommit\s+([0-9a-f]{5,})/i) {
 			my $init_char = $1;
 			my $orig_commit = lc($2);
+			my $stable = 0;
 			my $short = 1;
 			my $long = 0;
 			my $case = 1;
@@ -2330,6 +2331,7 @@ sub process {
 			my $orig_desc = "commit description";
 			my $description = "";
 
+			$stable = 1 if ($line =~ /\bcommit\s+[0-9a-f]{40}\s+upstream\./i);
 			$short = 0 if ($line =~ /\bcommit\s+[0-9a-f]{12,40}/i);
 			$long = 1 if ($line =~ /\bcommit\s+[0-9a-f]{41,}/i);
 			$space = 0 if ($line =~ /\bcommit [0-9a-f]/i);
@@ -2355,7 +2357,7 @@ sub process {
 			($id, $description) = git_commit_info($orig_commit,
 							      $id, $orig_desc);
 
-			if ($short || $long || $space || $case || ($orig_desc ne $description) || !$hasparens) {
+			if (!$stable && ($short || $long || $space || $case || ($orig_desc ne $description) || !$hasparens)) {
 				ERROR("GIT_COMMIT_ID",
 				      "Please use git commit description style 'commit <12+ chars of sha1> (\"<title line>\")' - ie: '${init_char}ommit $id (\"$description\")'\n" . $herecurr);
 			}
-- 
2.4.4