[PATCH] checkpatch: Avoid missing typo suggestions

[Kees Cook <keescook@chromium.org>]

My codespell dictionary has a lot of capitalized words. For example:

MSDOS->MS-DOS

Since checkpatch uses case-insensitive matching, I get an undefined
variable warning and then empty suggestions for things like this:

Use of uninitialized value $typo_fix in concatenation (.) or string at ./scripts/checkpatch.pl line 2958.

WARNING: 'msdos' may be misspelled - perhaps ''?
+       struct msdos_dir_entry *de;

This fixes the matcher to avoid the warning, but it's still a rather
silly suggestion:

WARNING: 'msdos' may be misspelled - perhaps 'MS-DOS'?
+       struct msdos_dir_entry *de;

So I'm not really sure what to do with this ... filter out bad
suggestions instead?

Cc: Andy Whitcroft <apw@canonical.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 scripts/checkpatch.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index e9f8146600d0..1aaf3317b6ad 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -727,7 +727,7 @@ if ($codespell) {
 
 			my ($suspect, $fix) = split(/->/, $line);
 
-			$spelling_fix{$suspect} = $fix;
+			$spelling_fix{lc($suspect)} = $fix;
 		}
 		close($spelling);
 	} else {
-- 
2.25.1


-- 
Kees Cook