1 files changed, 49 insertions, 11 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 464ee6ea8c61..6d85289f1c12 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -691,6 +691,9 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
         acpi_status status = 0;
         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
         union acpi_object *package = NULL;
+        union acpi_object in_arg[3];
+        struct acpi_object_list arg_list = { 3, in_arg };
+        acpi_status psw_status = AE_OK;
 
         struct acpi_device_id button_device_ids[] = {
                 {"PNP0C0D", 0},
@@ -699,7 +702,6 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
                 {"", 0},
         };
 
-
         /* _PRW */
         status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
         if (ACPI_FAILURE(status)) {
@@ -717,6 +719,45 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
         kfree(buffer.pointer);
 
         device->wakeup.flags.valid = 1;
+        /* Call _PSW/_DSW object to disable its ability to wake the sleeping
+         * system for the ACPI device with the _PRW object.
+         * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW.
+         * So it is necessary to call _DSW object first. Only when it is not
+         * present will the _PSW object used.
+         */
+        /*
+         * Three agruments are needed for the _DSW object.
+         * Argument 0: enable/disable the wake capabilities
+         * When _DSW object is called to disable the wake capabilities, maybe
+         * the first argument is filled. The value of the other two agruments
+         * is meaningless.
+         */
+        in_arg[0].type = ACPI_TYPE_INTEGER;
+        in_arg[0].integer.value = 0;
+        in_arg[1].type = ACPI_TYPE_INTEGER;
+        in_arg[1].integer.value = 0;
+        in_arg[2].type = ACPI_TYPE_INTEGER;
+        in_arg[2].integer.value = 0;
+        psw_status = acpi_evaluate_object(device->handle, "_DSW",
+                                                &arg_list, NULL);
+        if (ACPI_FAILURE(psw_status) && (psw_status != AE_NOT_FOUND))
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "error in evaluate _DSW\n"));
+        /*
+         * When the _DSW object is not present, OSPM will call _PSW object.
+         */
+        if (psw_status == AE_NOT_FOUND) {
+                /*
+                 * Only one agruments is required for the _PSW object.
+                 * agrument 0: enable/disable the wake capabilities
+                 */
+                arg_list.count = 1;
+                in_arg[0].integer.value = 0;
+                psw_status = acpi_evaluate_object(device->handle, "_PSW",
+                                                &arg_list, NULL);
+                if (ACPI_FAILURE(psw_status) && (psw_status != AE_NOT_FOUND))
+                        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "error in "
+                                                "evaluate _PSW\n"));
+        }
         /* Power button, Lid switch always enable wakeup */
         if (!acpi_match_device_ids(device, button_device_ids))
                 device->wakeup.flags.run_wake = 1;
@@ -881,10 +922,7 @@ static void acpi_device_get_busid(struct acpi_device *device,
 static int
 acpi_video_bus_match(struct acpi_device *device)
 {
-        acpi_handle h_dummy1;
-        acpi_handle h_dummy2;
-        acpi_handle h_dummy3;
-
+        acpi_handle h_dummy;
 
         if (!device)
                 return -EINVAL;
@@ -894,18 +932,18 @@ acpi_video_bus_match(struct acpi_device *device)
          */
 
         /* Does this device able to support video switching ? */
-        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
-            ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
+        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy)) &&
+            ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy)))
                 return 0;
 
         /* Does this device able to retrieve a video ROM ? */
-        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
+        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy)))
                 return 0;
 
         /* Does this device able to configure which video head to be POSTed ? */
-        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
-            ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
-            ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
+        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy)) &&
+            ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy)) &&
+            ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy)))
                 return 0;
 
         return -ENODEV;