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Date: Thu, 20 Dec 2012 02:53:18 +0100
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Cc: Toshi Kani <toshi.kani@...com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
LKML <linux-kernel@...r.kernel.org>, linux-pci@...r.kernel.org,
Yinghai Lu <yinghai@...nel.org>,
Myron Stowe <myron.stowe@...hat.com>,
Yijing Wang <wangyijing0307@...il.com>,
Jiang Liu <liuj97@...il.com>
Subject: [PATCH 8/16] ACPI: Remove acpi_start_single_object() and acpi_bus_start()
From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
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: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Acked-by: Yinghai Lu <yinghai@...nel.org>
---
drivers/acpi/container.c | 16 +-------
drivers/acpi/scan.c | 66 ++++---------------------------------
drivers/pci/hotplug/acpiphp_glue.c | 4 --
drivers/pci/hotplug/sgi_hotplug.c | 2 -
include/acpi/acpi_bus.h | 1
5 files changed, 12 insertions(+), 77 deletions(-)
Index: linux/drivers/acpi/scan.c
===================================================================
--- linux.orig/drivers/acpi/scan.c
+++ linux/drivers/acpi/scan.c
@@ -612,7 +612,6 @@ static void acpi_device_remove_notify_ha
}
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);
@@ -621,9 +620,6 @@ static int acpi_device_probe(struct devi
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) {
@@ -802,24 +798,6 @@ acpi_bus_driver_init(struct acpi_device
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
@@ -1714,59 +1692,31 @@ static int acpi_bus_scan(acpi_handle han
}
/*
- * 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)
{
Index: linux/include/acpi/acpi_bus.h
===================================================================
--- linux.orig/include/acpi/acpi_bus.h
+++ linux/include/acpi/acpi_bus.h
@@ -402,7 +402,6 @@ int acpi_bus_add(struct acpi_device **ch
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);
Index: linux/drivers/pci/hotplug/sgi_hotplug.c
===================================================================
--- linux.orig/drivers/pci/hotplug/sgi_hotplug.c
+++ linux/drivers/pci/hotplug/sgi_hotplug.c
@@ -457,8 +457,6 @@ static int enable_slot(struct hotplug_sl
ret, (int)(adr>>16),
(int)(adr&0xffff));
/* try to continue on */
- } else {
- acpi_bus_start(device);
}
}
}
Index: linux/drivers/pci/hotplug/acpiphp_glue.c
===================================================================
--- linux.orig/drivers/pci/hotplug/acpiphp_glue.c
+++ linux/drivers/pci/hotplug/acpiphp_glue.c
@@ -759,7 +759,6 @@ static int acpiphp_bus_add(struct acpiph
-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
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");
Index: linux/drivers/acpi/container.c
===================================================================
--- linux.orig/drivers/acpi/container.c
+++ linux/drivers/acpi/container.c
@@ -139,24 +139,14 @@ static int container_device_add(struct a
{
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)
--
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