checkpatch: Fix use of uninitialized value

checkfilename() doesn't always set $acpi_testexpected. Fix the following
warning:

Use of uninitialized value $acpi_testexpected in string eq at
 ./scripts/checkpatch.pl line 1529.

Fixes: d2f1af0e4120 ("checkpatch: don't emit warning on newly created acpi data files")
Cc: isaku.yamahata@intel.com
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <161786467973.295167.5612704777283969903.stgit@bahia.lan>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 8f7053ec9b26727735448187da3fb01b3f5a1790..3d185cceac94790e667c6c6eb77a57925fb877d6 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1532,6 +1532,7 @@ sub process {
                     ($line =~ /\{\s*([\w\/\.\-]*)\s*\=\>\s*([\w\/\.\-]*)\s*\}/ &&
                      (defined($1) || defined($2)))) &&
                       !(($realfile ne '') &&
+                        defined($acpi_testexpected) &&
                         ($realfile eq $acpi_testexpected))) {
                        $reported_maintainer_file = 1;
                        WARN("added, moved or deleted file(s), does MAINTAINERS need updating?\n" . $herecurr);