From e10113d22d8df87f26635d1a0e7f07c840839c23 Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Thu, 25 Mar 2010 00:35:36 +0000
Subject: [PATCH] [ACPI] - Don't attempt to parse output arguments if none were
 returned

svn path=/trunk/; revision=46417
---
 reactos/drivers/bus/acpi/eval.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/reactos/drivers/bus/acpi/eval.c b/reactos/drivers/bus/acpi/eval.c
index 5433f96a51e..68af8573f42 100644
--- a/reactos/drivers/bus/acpi/eval.c
+++ b/reactos/drivers/bus/acpi/eval.c
@@ -93,6 +93,10 @@ Bus_PDO_EvalMethod(PPDO_DEVICE_DATA DeviceData,
       ACPI_OBJECT *Obj = RetBuff.Pointer;
       ULONG ExtraParamLength;
 
+      /* If we didn't get anything back then we're done */
+      if (!RetBuff.Pointer || RetBuff.Length == 0)
+          return STATUS_SUCCESS;
+
       switch (Obj->Type)
       {
           case ACPI_TYPE_INTEGER:
-- 
2.17.1