Merge branch 'davinci-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[pandora-kernel.git] / drivers / acpi / scan.c

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index ff9f622..fb7fc24 100644 (file)
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -741,19 +741,40 @@ acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device,
        return AE_OK;
 }
 
-static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
+static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
 {
-       acpi_status status = 0;
-       struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
-       union acpi_object *package = NULL;
-       int psw_error;
-
        struct acpi_device_id button_device_ids[] = {
                {"PNP0C0D", 0},
                {"PNP0C0C", 0},
                {"PNP0C0E", 0},
                {"", 0},
        };
+       acpi_status status;
+       acpi_event_status event_status;
+
+       device->wakeup.run_wake_count = 0;
+       device->wakeup.flags.notifier_present = 0;
+
+       /* Power button, Lid switch always enable wakeup */
+       if (!acpi_match_device_ids(device, button_device_ids)) {
+               device->wakeup.flags.run_wake = 1;
+               device->wakeup.flags.always_enabled = 1;
+               return;
+       }
+
+       status = acpi_get_gpe_status(NULL, device->wakeup.gpe_number,
+                                       ACPI_NOT_ISR, &event_status);
+       if (status == AE_OK)
+               device->wakeup.flags.run_wake =
+                               !!(event_status & ACPI_EVENT_FLAG_HANDLE);
+}
+
+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;
+       int psw_error;
 
        /* _PRW */
        status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
@@ -773,6 +794,7 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
 
        device->wakeup.flags.valid = 1;
        device->wakeup.prepare_count = 0;
+       acpi_bus_set_run_wake_flags(device);
        /* 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.
@@ -784,10 +806,6 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                "error in _DSW or _PSW evaluation\n"));
 
-       /* Power button, Lid switch always enable wakeup */
-       if (!acpi_match_device_ids(device, button_device_ids))
-               device->wakeup.flags.run_wake = 1;
-
 end:
        if (ACPI_FAILURE(status))
                device->flags.wake_capable = 0;
@@ -1336,9 +1354,25 @@ static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops,
 
        if (child)
                *child = device;
-       return 0;
+
+       if (device)
+               return 0;
+       else
+               return -ENODEV;
 }
 
+/*
+ * acpi_bus_add and acpi_bus_start
+ *
+ * scan a given ACPI tree and (probably recently hot-plugged)
+ * create and add or starts found devices.
+ *
+ * If no devices were found -ENODEV is returned which does not
+ * mean that this is a real error, there just have been no suitable
+ * ACPI objects in the table trunk from which the kernel could create
+ * a device and add/start an appropriate driver.
+ */
+
 int
 acpi_bus_add(struct acpi_device **child,
             struct acpi_device *parent, acpi_handle handle, int type)
@@ -1348,8 +1382,7 @@ acpi_bus_add(struct acpi_device **child,
        memset(&ops, 0, sizeof(ops));
        ops.acpi_op_add = 1;
 
-       acpi_bus_scan(handle, &ops, child);
-       return 0;
+       return acpi_bus_scan(handle, &ops, child);
 }
 EXPORT_SYMBOL(acpi_bus_add);
 
@@ -1357,11 +1390,13 @@ int acpi_bus_start(struct acpi_device *device)
 {
        struct acpi_bus_ops ops;
 
+       if (!device)
+               return -EINVAL;
+
        memset(&ops, 0, sizeof(ops));
        ops.acpi_op_start = 1;
 
-       acpi_bus_scan(device->handle, &ops, NULL);
-       return 0;
+       return acpi_bus_scan(device->handle, &ops, NULL);
 }
 EXPORT_SYMBOL(acpi_bus_start);