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ACPI: Drop device flag wake_capable

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The wake_capable ACPI device flag is not necessary, because it is
only used in scan.c for recording the information that _PRW is
present for the given device.  That information is only used by
acpi_add_single_object() to decide whether or not to call
acpi_bus_get_wakeup_device_flags(), so the flag may be dropped
if the _PRW check is moved to acpi_bus_get_wakeup_device_flags().
Moreover, acpi_bus_get_wakeup_device_flags() always returns 0,
so it really should be void.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Rafael J. Wysocki 2011-01-06 23:41:27 +01:00 committed by Len Brown
parent 86e4e20e8a
commit d57d09a480
2 changed files with 10 additions and 19 deletions
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26
drivers/acpi/scan.c
View File

@ -815,16 +815,22 @@ static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
!!(event_status & ACPI_EVENT_FLAG_HANDLE);
}
static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
{
acpi_handle temp;
acpi_status status = 0;
int psw_error;
/* Presence of _PRW indicates wake capable */
status = acpi_get_handle(device->handle, "_PRW", &temp);
if (ACPI_FAILURE(status))
return;
status = acpi_bus_extract_wakeup_device_power_package(device->handle,
&device->wakeup);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package"));
goto end;
return;
}
device->wakeup.flags.valid = 1;
@ -840,11 +846,6 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
if (psw_error)
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"error in _DSW or _PSW evaluation\n"));
end:
if (ACPI_FAILURE(status))
device->flags.wake_capable = 0;
return 0;
}
static void acpi_bus_add_power_resource(acpi_handle handle);
@ -950,11 +951,6 @@ static int acpi_bus_get_flags(struct acpi_device *device)
if (ACPI_SUCCESS(status))
device->flags.power_manageable = 1;
/* Presence of _PRW indicates wake capable */
status = acpi_get_handle(device->handle, "_PRW", &temp);
if (ACPI_SUCCESS(status))
device->flags.wake_capable = 1;
/* TBD: Performance management */
return 0;
@ -1281,11 +1277,7 @@ static int acpi_add_single_object(struct acpi_device **child,
* Wakeup device management
*-----------------------
*/
if (device->flags.wake_capable) {
result = acpi_bus_get_wakeup_device_flags(device);
if (result)
goto end;
}
acpi_bus_get_wakeup_device_flags(device);
/*
* Performance Management

3
include/acpi/acpi_bus.h
View File

@ -148,8 +148,7 @@ struct acpi_device_flags {
u32 suprise_removal_ok:1;
u32 power_manageable:1;
u32 performance_manageable:1;
u32 wake_capable:1; /* Wakeup(_PRW) supported? */
u32 reserved:23;
u32 reserved:24;
};
/* File System */