checkpatch --file warns about p0 patch

[Mike Rapoport <mike@compulab.co.il>]

When running checkpatch.pl with --file option it warns about -p0 patch:

./scripts/checkpatch.pl --file ./drivers/rtc/rtc-v3020.c
WARNING: patch prefix '.' exists, appears to be a -p0 patch

total: 0 errors, 1 warnings, 263 lines checked

./drivers/rtc/rtc-v3020.c has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

I hope this is the fix that'll work:

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 45eb0ae..1869388 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1240,7 +1240,7 @@ sub process {
 			$realfile =~ s@^([^/]*)/@@;

 			$p1_prefix = $1;
-			if ($tree && $p1_prefix ne '' && -e "$root/$p1_prefix") {
+			if (!$file && $tree && $p1_prefix ne '' && -e "$root/$p1_prefix") {
 				WARN("patch prefix '$p1_prefix' exists, appears to be a -p0 patch\n");
 			}



-- 
Sincerely yours,
Mike.