checkpatch: ignore email headers better

There are some patches created by git format-patch that when scanned by
checkpatch report errors on lines like

To:	address.tld

This is a checkpatch false positive.

Improve the logic a bit to ignore folded email headers to avoid emitting
these messages.

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>

1 files changed, 3 insertions, 2 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 538105ae88b3..1ec68083a929 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1637,7 +1637,7 @@ sub process {
         my $signoff = 0;
         my $is_patch = 0;
 
-        my $in_header_lines = 1;
+        my $in_header_lines = $file ? 0 : 1;
         my $in_commit_log = 0;          #Scanning lines before patch
 
         my $non_utf8_charset = 0;
@@ -1993,7 +1993,8 @@ sub process {
 # Check if it's the start of a commit log
 # (not a header line and we haven't seen the patch filename)
                 if ($in_header_lines && $realfile =~ /^$/ &&
-                    $rawline !~ /^(commit\b|from\b|[\w-]+:).+$/i) {
+                    !($rawline =~ /^\s+\S/ ||
+                      $rawline =~ /^(commit\b|from\b|[\w-]+:).*$/i)) {
                         $in_header_lines = 0;
                         $in_commit_log = 1;
                 }