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ACPI / scan: Make scanning of fixed devices follow the general scheme 

Make acpi_bus_scan_fixed() use device_attach() directly to attach
drivers, if any, to the fixed devices in analogy with how
acpi_bus_scan() works, which allows the last argument of
acpi_add_single_object() to be dropped and the manipulation of the
flags.match_driver bit to be moved to acpi_init_device_object()
and acpi_device_add_finalize().

After these changes all of the functions for the initialization
and registration of struct acpi_device objects work in the same
way for all of them.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
This commit is contained in:
Rafael J. Wysocki 2013-01-29 13:57:20 +01:00
parent 8a78cf70fa
commit 2c0d4fe018
1 changed files with 24 additions and 11 deletions
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35
drivers/acpi/scan.c
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@ -1441,19 +1441,21 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
acpi_device_get_busid(device);
acpi_device_set_id(device);
acpi_bus_get_flags(device);
device->flags.match_driver = false;
device_initialize(&device->dev);
dev_set_uevent_suppress(&device->dev, true);
}
void acpi_device_add_finalize(struct acpi_device *device)
{
device->flags.match_driver = true;
dev_set_uevent_suppress(&device->dev, false);
kobject_uevent(&device->dev.kobj, KOBJ_ADD);
}
static int acpi_add_single_object(struct acpi_device **child,
acpi_handle handle, int type,
unsigned long long sta, bool match_driver)
unsigned long long sta)
{
int result;
struct acpi_device *device;
@ -1469,7 +1471,6 @@ static int acpi_add_single_object(struct acpi_device **child,
acpi_bus_get_power_flags(device);
acpi_bus_get_wakeup_device_flags(device);
device->flags.match_driver = match_driver;
result = acpi_device_add(device, acpi_device_release);
if (result) {
acpi_device_release(&device->dev);
@ -1562,12 +1563,10 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
return AE_CTRL_DEPTH;
}
acpi_add_single_object(&device, handle, type, sta, false);
acpi_add_single_object(&device, handle, type, sta);
if (!device)
return AE_CTRL_DEPTH;
device->flags.match_driver = true;
out:
if (!*return_value)
*return_value = device;
@ -1679,25 +1678,39 @@ EXPORT_SYMBOL_GPL(acpi_bus_trim);
static int acpi_bus_scan_fixed(void)
{
int result = 0;
struct acpi_device *device = NULL;
/*
* Enumerate all fixed-feature devices.
*/
if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) {
if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) {
struct acpi_device *device = NULL;
result = acpi_add_single_object(&device, NULL,
ACPI_BUS_TYPE_POWER_BUTTON,
ACPI_STA_DEFAULT, true);
ACPI_STA_DEFAULT);
if (result)
return result;
result = device_attach(&device->dev);
if (result < 0)
return result;
device_init_wakeup(&device->dev, true);
}
if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) {
struct acpi_device *device = NULL;
result = acpi_add_single_object(&device, NULL,
ACPI_BUS_TYPE_SLEEP_BUTTON,
ACPI_STA_DEFAULT, true);
ACPI_STA_DEFAULT);
if (result)
return result;
result = device_attach(&device->dev);
}
return result;
return result < 0 ? result : 0;
}
int __init acpi_scan_init(void)