checkpatch: comment ends inside strings is most likely not an open comment

When we are detecting whether a comment is open when we start a hunk we
check for the first comment edge in the hunk and assume its inverse.
However if the hunk contains something like below, then we will assume
that a comment was open.  Update this heuristic to see if the comment edge
is obviously within double quotes and ignore it if so:

	foo(" */);

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 3 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 9883de38b44..45a97c9f4c9 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -367,7 +367,7 @@ sub sanitise_line {
                         }
                 }
 
-                #print "SQ:$sanitise_quote\n";
+                #print "c<$c> SQ<$sanitise_quote>\n";
                 if ($off != 0 && $sanitise_quote eq '*/' && $c ne "\t") {
                         substr($res, $off, 1, $;);
                 } elsif ($off != 0 && $sanitise_quote && $c ne "\t") {
@@ -1103,8 +1103,11 @@ sub process {
                                 $cnt--;
                                 #print "RAW<$rawlines[$ln - 1]>\n";
                                 last if (!defined $rawlines[$ln - 1]);
-                                ($edge) = ($rawlines[$ln - 1] =~ m@(/\*|\*/)@);
-                                last if (defined $edge);
+                                if ($rawlines[$ln - 1] =~ m@(/\*|\*/)@ &&
+                                    $rawlines[$ln - 1] !~ m@"[^"]*(?:/\*|\*/)[^"]*"@) {
+                                        ($edge) = $1;
+                                        last;
+                                }
                         }
                         if (defined $edge && $edge eq '*/') {
                                 $in_comment = 1;