checkpatch: improve CONSTANT_COMPARISON test for structure members

A "." dereference to an all uppercase structure member can be
incorrectly reported as a CONSTANT_COMPARISON.

ie: "if (table[i].PANELID == tempdx)"

Fix it by checking for "." before the constant test.

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 eb8f887..e3d9c34 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4291,7 +4291,7 @@ sub process {
                        my $comp = $3;
                        my $to = $4;
                        my $newcomp = $comp;
-                       if ($lead !~ /$Operators\s*$/ &&
+                       if ($lead !~ /(?:$Operators|\.)\s*$/ &&
                            $to !~ /^(?:Constant|[A-Z_][A-Z0-9_]*)$/ &&
                            WARN("CONSTANT_COMPARISON",
                                 "Comparisons should place the constant on the right side of the test\n" . $herecurr) &&