提交 02f57c67 编写于 作者: R Rafael J. Wysocki

ACPI: Remove acpi_start_single_object() and acpi_bus_start()

The ACPI PCI root bridge driver was the only ACPI driver implementing
the .start() callback, which isn't used by any ACPI drivers any more
now.

For this reason, acpi_start_single_object() has no purpose any more,
so remove it and all references to it.  Also remove
acpi_bus_start_device(), whose only purpose was to call
acpi_start_single_object().

Moreover, since after the removal of acpi_bus_start_device() the
only purpose of acpi_bus_start() remains to call
acpi_update_all_gpes(), move that into acpi_bus_add() and drop
acpi_bus_start() too, remove its header from acpi_bus.h and
update all of its former users accordingly.

This change was previously proposed in a different from by
Yinghai Lu.
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: NYinghai Lu <yinghai@kernel.org>
Acked-by: NToshi Kani <toshi.kani@hp.com>
上级 47525cda
......@@ -139,24 +139,14 @@ static int container_device_add(struct acpi_device **device, acpi_handle handle)
{
acpi_handle phandle;
struct acpi_device *pdev;
int result;
if (acpi_get_parent(handle, &phandle)) {
return -ENODEV;
}
if (acpi_bus_get_device(phandle, &pdev)) {
if (acpi_get_parent(handle, &phandle))
return -ENODEV;
}
if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_DEVICE)) {
if (acpi_bus_get_device(phandle, &pdev))
return -ENODEV;
}
result = acpi_bus_start(*device);
return result;
return acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_DEVICE);
}
static void container_notify_cb(acpi_handle handle, u32 type, void *context)
......
......@@ -571,7 +571,6 @@ static void acpi_device_remove_notify_handler(struct acpi_device *device)
}
static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *);
static int acpi_start_single_object(struct acpi_device *);
static int acpi_device_probe(struct device * dev)
{
struct acpi_device *acpi_dev = to_acpi_device(dev);
......@@ -580,9 +579,6 @@ static int acpi_device_probe(struct device * dev)
ret = acpi_bus_driver_init(acpi_dev, acpi_drv);
if (!ret) {
if (acpi_dev->add_type == ACPI_BUS_ADD_START)
acpi_start_single_object(acpi_dev);
if (acpi_drv->ops.notify) {
ret = acpi_device_install_notify_handler(acpi_dev);
if (ret) {
......@@ -761,24 +757,6 @@ acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver)
return 0;
}
static int acpi_start_single_object(struct acpi_device *device)
{
int result = 0;
struct acpi_driver *driver;
if (!(driver = device->driver))
return 0;
if (driver->ops.start) {
result = driver->ops.start(device);
if (result && driver->ops.remove)
driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL);
}
return result;
}
/**
* acpi_bus_register_driver - register a driver with the ACPI bus
* @driver: driver being registered
......@@ -1673,59 +1651,31 @@ static int acpi_bus_scan(acpi_handle handle, bool start,
}
/*
* acpi_bus_add and acpi_bus_start
* acpi_bus_add
*
* scan a given ACPI tree and (probably recently hot-plugged)
* create and add or starts found devices.
* create and add 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.
* a device and add an appropriate driver.
*/
int
acpi_bus_add(struct acpi_device **child,
struct acpi_device *parent, acpi_handle handle, int type)
{
return acpi_bus_scan(handle, false, child);
}
EXPORT_SYMBOL(acpi_bus_add);
static acpi_status acpi_bus_start_device(acpi_handle handle, u32 lvl,
void *not_used, void **ret_not_used)
{
struct acpi_device *device;
unsigned long long sta_not_used;
int type_not_used;
/*
* Ignore errors ignored by acpi_bus_check_add() to avoid terminating
* namespace walks prematurely.
*/
if (acpi_bus_type_and_status(handle, &type_not_used, &sta_not_used))
return AE_OK;
if (acpi_bus_get_device(handle, &device))
return AE_CTRL_DEPTH;
return acpi_start_single_object(device);
}
int acpi_bus_start(struct acpi_device *device)
{
if (!device)
return -EINVAL;
int err;
if (ACPI_SUCCESS(acpi_start_single_object(device)))
acpi_walk_namespace(ACPI_TYPE_ANY, device->handle,
ACPI_UINT32_MAX, acpi_bus_start_device,
NULL, NULL, NULL);
err = acpi_bus_scan(handle, false, child);
if (err)
return err;
acpi_update_all_gpes();
return 0;
}
EXPORT_SYMBOL(acpi_bus_start);
EXPORT_SYMBOL(acpi_bus_add);
int acpi_bus_trim(struct acpi_device *start, int rmdevice)
{
......
......@@ -759,7 +759,6 @@ static int acpiphp_bus_add(struct acpiphp_func *func)
-ret_val);
goto acpiphp_bus_add_out;
}
ret_val = acpi_bus_start(device);
acpiphp_bus_add_out:
return ret_val;
......@@ -1148,8 +1147,7 @@ static void handle_bridge_insertion(acpi_handle handle, u32 type)
err("cannot add bridge to acpi list\n");
return;
}
if (!acpiphp_configure_bridge(handle) &&
!acpi_bus_start(device))
if (!acpiphp_configure_bridge(handle))
add_bridge(handle);
else
err("cannot configure and start bridge\n");
......
......@@ -457,8 +457,6 @@ static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
ret, (int)(adr>>16),
(int)(adr&0xffff));
/* try to continue on */
} else {
acpi_bus_start(device);
}
}
}
......
......@@ -362,7 +362,6 @@ int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
acpi_handle handle, int type);
void acpi_bus_hot_remove_device(void *context);
int acpi_bus_trim(struct acpi_device *start, int rmdevice);
int acpi_bus_start(struct acpi_device *device);
acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
int acpi_match_device_ids(struct acpi_device *device,
const struct acpi_device_id *ids);
......
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