If one patch has Kconfig section with only one 'config', then variable
'$is_start' will be set by first 'config' line and '$is_end' set by the
second 'config' line. But patches often has only one 'config' line so
we have no chance to set '$is_end', as result below condition is invalid
and it skips check for Kconfig description:

        if ($is_start && $is_end && $length < $min_conf_desc_length) {
                ......
        }

When script runs to this condition sentence it means the Kconfig
section parsing has been completed, whatever '$is_end' is true
or not. So removes '$is_end' from condition sentence.

Another change is to change '$min_conf_desc_length' from 4 to 1; so can
pass the check if the Kconfig description has at least one line.

Signed-off-by: Leo Yan <leo....@linaro.org>
---
 scripts/checkpatch.pl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 3453df9..ba724b0 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -51,7 +51,7 @@ my $configuration_file = ".checkpatch.conf";
 my $max_line_length = 80;
 my $ignore_perl_version = 0;
 my $minimum_perl_version = 5.10.0;
-my $min_conf_desc_length = 4;
+my $min_conf_desc_length = 1;
 my $spelling_file = "$D/spelling.txt";
 my $codespell = 0;
 my $codespellfile = "/usr/share/codespell/dictionary.txt";
@@ -2796,7 +2796,7 @@ sub process {
                                }
                                $length++;
                        }
-                       if ($is_start && $is_end && $length < 
$min_conf_desc_length) {
+                       if ($is_start && $length < $min_conf_desc_length) {
                                WARN("CONFIG_DESCRIPTION",
                                     "please write a paragraph that describes 
the config symbol fully\n" . $herecurr);
                        }
-- 
2.7.4

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