checkpatch: improve the compatible vendor match

Improve the vendor name match in vendor-prefix.txt by only matching the
exact vendor name at the beginning of lines.

Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Cc: Joe Perches <joe@perches.com>
Acked-by: Rob Herring <robh@kernel.org>
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 271d2f9..921c037 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2080,9 +2080,11 @@ sub process {
 
                        my @compats = $rawline =~ /\"([a-zA-Z0-9\-\,\.\+_]+)\"/g;
 
+                       my $dt_path = $root . "/Documentation/devicetree/bindings/";
+                       my $vp_file = $dt_path . "vendor-prefixes.txt";
+
                        foreach my $compat (@compats) {
                                my $compat2 = $compat;
-                               my $dt_path =  $root . "/Documentation/devicetree/bindings/";
                                $compat2 =~ s/\,[a-z]*\-/\,<\.\*>\-/;
                                `grep -Erq "$compat|$compat2" $dt_path`;
                                if ( $? >> 8 ) {
@@ -2090,14 +2092,12 @@ sub process {
                                             "DT compatible string \"$compat\" appears un-documented -- check $dt_path\n" . $herecurr);
                                }
 
-                               my $vendor_path = $dt_path . "vendor-prefixes.txt";
-                               next if (! -f $vendor_path);
                                next if $compat !~ /^([a-zA-Z0-9\-]+)\,/;
                                my $vendor = $1;
-                               `grep -Eq "$vendor" $vendor_path`;
+                               `grep -Eq "^$vendor\\b" $vp_file`;
                                if ( $? >> 8 ) {
                                        WARN("UNDOCUMENTED_DT_STRING",
-                                            "DT compatible string vendor \"$vendor\" appears un-documented -- check $vendor_path\n" . $herecurr);
+                                            "DT compatible string vendor \"$vendor\" appears un-documented -- check $vp_file\n" . $herecurr);
                                }
                        }
                }