wmi: convert acpi_evaluate_object() to acpi_execute_simple_method()

acpi_execute_simple_method() is a new ACPI API introduced to invoke
an ACPI control method that has single integer parameter and no return value.

Convert acpi_evaluate_object() to acpi_execute_simple_method()
in drivers/platform/x86/wmi.c

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
CC: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 6 insertions, 19 deletions

diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 601ea9512242..3bb55060bd05 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -252,8 +252,6 @@ static acpi_status wmi_method_enable(struct wmi_block *wblock, int enable)
 {
         struct guid_block *block = NULL;
         char method[5];
-        struct acpi_object_list input;
-        union acpi_object params[1];
         acpi_status status;
         acpi_handle handle;
 
@@ -263,13 +261,9 @@ static acpi_status wmi_method_enable(struct wmi_block *wblock, int enable)
         if (!block)
                 return AE_NOT_EXIST;
 
-        input.count = 1;
-        input.pointer = params;
-        params[0].type = ACPI_TYPE_INTEGER;
-        params[0].integer.value = enable;
 
         snprintf(method, 5, "WE%02X", block->notify_id);
-        status = acpi_evaluate_object(handle, method, &input, NULL);
+        status = acpi_execute_simple_method(handle, method, enable);
 
         if (status != AE_OK && status != AE_NOT_FOUND)
                 return status;
@@ -355,8 +349,8 @@ struct acpi_buffer *out)
         struct wmi_block *wblock = NULL;
         acpi_handle handle, wc_handle;
         acpi_status status, wc_status = AE_ERROR;
-        struct acpi_object_list input, wc_input;
-        union acpi_object wc_params[1], wq_params[1];
+        struct acpi_object_list input;
+        union acpi_object wq_params[1];
         char method[5];
         char wc_method[5] = "WC";
 
@@ -386,11 +380,6 @@ struct acpi_buffer *out)
          * enable collection.
          */
         if (block->flags & ACPI_WMI_EXPENSIVE) {
-                wc_input.count = 1;
-                wc_input.pointer = wc_params;
-                wc_params[0].type = ACPI_TYPE_INTEGER;
-                wc_params[0].integer.value = 1;
-
                 strncat(wc_method, block->object_id, 2);
 
                 /*
@@ -400,8 +389,8 @@ struct acpi_buffer *out)
                  */
                 wc_status = acpi_get_handle(handle, wc_method, &wc_handle);
                 if (ACPI_SUCCESS(wc_status))
-                        wc_status = acpi_evaluate_object(handle, wc_method,
-                                &wc_input, NULL);
+                        wc_status = acpi_execute_simple_method(handle,
+                                                                wc_method, 1);
         }
 
         strcpy(method, "WQ");
@@ -414,9 +403,7 @@ struct acpi_buffer *out)
          * the WQxx method failed - we should disable collection anyway.
          */
         if ((block->flags & ACPI_WMI_EXPENSIVE) && ACPI_SUCCESS(wc_status)) {
-                wc_params[0].integer.value = 0;
-                status = acpi_evaluate_object(handle,
-                wc_method, &wc_input, NULL);
+                status = acpi_execute_simple_method(handle, wc_method, 0);
         }
 
         return status;