From: Bob Moore <robert.moore@intel.com>
Date: Tue, 29 Oct 2013 01:29:04 +0000 (+0800)
Subject: ACPICA: Add a check for a null node during namespace walk.
X-Git-Tag: v3.13-rc2~19^2~2^2~39
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=48961ce62787502fe2afce2aeeb0ec306757a2bb;p=kernel%2Fkernel-generic.git

ACPICA: Add a check for a null node during namespace walk.

Mostly for consistency. ACPICA BZ 1042.

Actually, currently no one is experiencing problem without this check
as the obj_handle is guaranteed to be valid.

References: https://bugs.acpica.org/show_bug.cgi?id=1042
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/drivers/acpi/acpica/nsdump.c b/drivers/acpi/acpica/nsdump.c
index 8063385..c634854 100644
--- a/drivers/acpi/acpica/nsdump.c
+++ b/drivers/acpi/acpica/nsdump.c
@@ -715,6 +715,13 @@ acpi_ns_dump_one_object_path(acpi_handle obj_handle,
 	}
 
 	node = acpi_ns_validate_handle(obj_handle);
+	if (!node) {
+
+		/* Ignore bad node during namespace walk */
+
+		return (AE_OK);
+	}
+
 	pathname = acpi_ns_get_external_pathname(node);
 
 	path_indent = 1;