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Code Issues Releases Wiki Activity

ACPI: scan: Drop sta argument from acpi_init_device_object()

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Use the observation that the initial status check for
ACPI_BUS_TYPE_PROCESSOR objects can be carried out in the same way
as for ACPI_BUS_TYPE_DEVICE objects and it is not necessary to fail
acpi_add_single_object() if acpi_bus_get_status_handle() returns an
error for a processor (its status can be set to 0 instead) to
simplify acpi_add_single_object().

Accordingly, drop the "sta" argument from acpi_init_device_object()
as it can always set the initial status to ACPI_STA_DEFAULT and let
its caller correct that later on.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Rafael J. Wysocki 2021-04-07 16:32:43 +02:00
parent f926e94338
commit f5d9ab1d80
3 changed files with 16 additions and 18 deletions
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3
drivers/acpi/internal.h
View file

@ -109,8 +109,7 @@ struct acpi_device_bus_id {
int acpi_device_add(struct acpi_device *device,
void (*release)(struct device *));
void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
int type, unsigned long long sta,
struct acpi_device_info *info);
int type, struct acpi_device_info *info);
int acpi_device_setup_files(struct acpi_device *dev);
void acpi_device_remove_files(struct acpi_device *dev);
void acpi_device_add_finalize(struct acpi_device *device);

3
drivers/acpi/power.c
View file

@ -925,8 +925,7 @@ int acpi_add_power_resource(acpi_handle handle)
return -ENOMEM;
device = &resource->device;
acpi_init_device_object(device, handle, ACPI_BUS_TYPE_POWER,
ACPI_STA_DEFAULT, NULL);
acpi_init_device_object(device, handle, ACPI_BUS_TYPE_POWER, NULL);
mutex_init(&resource->resource_lock);
INIT_LIST_HEAD(&resource->list_node);
INIT_LIST_HEAD(&resource->dependents);

28
drivers/acpi/scan.c
View file

@ -1649,15 +1649,14 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
}
void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
int type, unsigned long long sta,
struct acpi_device_info *info)
int type, struct acpi_device_info *info)
{
INIT_LIST_HEAD(&device->pnp.ids);
device->device_type = type;
device->handle = handle;
device->parent = acpi_bus_get_parent(handle);
fwnode_init(&device->fwnode, &acpi_device_fwnode_ops);
acpi_set_device_status(device, sta);
acpi_set_device_status(device, ACPI_STA_DEFAULT);
acpi_device_get_busid(device);
acpi_set_pnp_ids(handle, &device->pnp, type, info);
acpi_init_properties(device);
@ -1680,19 +1679,21 @@ void acpi_device_add_finalize(struct acpi_device *device)
kobject_uevent(&device->dev.kobj, KOBJ_ADD);
}
static void acpi_scan_init_status(struct acpi_device *adev)
{
if (acpi_bus_get_status(adev))
acpi_set_device_status(adev, 0);
}
static int acpi_add_single_object(struct acpi_device **child,
acpi_handle handle, int type)
{
struct acpi_device_info *info = NULL;
unsigned long long sta = ACPI_STA_DEFAULT;
struct acpi_device *device;
int result;
if (type == ACPI_BUS_TYPE_DEVICE && handle != ACPI_ROOT_OBJECT)
acpi_get_object_info(handle, &info);
else if (type == ACPI_BUS_TYPE_PROCESSOR &&
ACPI_FAILURE(acpi_bus_get_status_handle(handle, &sta)))
return -ENODEV;
device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL);
if (!device) {
@ -1700,16 +1701,15 @@ static int acpi_add_single_object(struct acpi_device **child,
return -ENOMEM;
}
acpi_init_device_object(device, handle, type, sta, info);
acpi_init_device_object(device, handle, type, info);
kfree(info);
/*
* For ACPI_BUS_TYPE_DEVICE getting the status is delayed till here so
* that we can call acpi_bus_get_status() and use its quirk handling.
* Note this must be done before the get power-/wakeup_dev-flags calls.
* Getting the status is delayed till here so that we can call
* acpi_bus_get_status() and use its quirk handling. Note that
* this must be done before the get power-/wakeup_dev-flags calls.
*/
if (type == ACPI_BUS_TYPE_DEVICE)
if (acpi_bus_get_status(device) < 0)
acpi_set_device_status(device, 0);
if (type == ACPI_BUS_TYPE_DEVICE || type == ACPI_BUS_TYPE_PROCESSOR)
acpi_scan_init_status(device);
acpi_bus_get_power_flags(device);
acpi_bus_get_wakeup_device_flags(device);