ACPI: VIDEO: Adjust current level to closest available one.

[safe/jmp/linux-2.6] / drivers / acpi / events / evxfevnt.c

diff --git a/drivers/acpi/events/evxfevnt.c b/drivers/acpi/events/evxfevnt.c
index a3d148e..9cbd341 100644 (file)
--- a/drivers/acpi/events/evxfevnt.c
+++ b/drivers/acpi/events/evxfevnt.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2006, R. Byron Moore
+ * Copyright (C) 2000 - 2007, R. Byron Moore
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -44,6 +44,7 @@
 #include <acpi/acpi.h>
 #include <acpi/acevents.h>
 #include <acpi/acnamesp.h>
+#include <acpi/actables.h>
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evxfevnt")
@@ -65,6 +66,14 @@ acpi_status acpi_enable(void)
 
        ACPI_FUNCTION_TRACE(acpi_enable);
 
+       /* ACPI tables must be present */
+
+       if (!acpi_tb_tables_loaded()) {
+               return_ACPI_STATUS(AE_NO_ACPI_TABLES);
+       }
+
+       /* Check current mode */
+
        if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
                ACPI_DEBUG_PRINT((ACPI_DB_INIT,
                                  "System is already in ACPI mode\n"));
@@ -463,7 +472,6 @@ acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
 }
 
 ACPI_EXPORT_SYMBOL(acpi_clear_gpe)
-
 #ifdef ACPI_FUTURE_USAGE
 /*******************************************************************************
  *
@@ -559,7 +567,6 @@ acpi_get_gpe_status(acpi_handle gpe_device,
 
 ACPI_EXPORT_SYMBOL(acpi_get_gpe_status)
 #endif                         /*  ACPI_FUTURE_USAGE  */
-
 /*******************************************************************************
  *
  * FUNCTION:    acpi_install_gpe_block