diff options
author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2012-12-21 00:36:47 +0100 |
---|---|---|
committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-01-03 13:09:39 +0100 |
commit | 636458de36f1fb4cdd318387d2f45604e451b17a (patch) | |
tree | 484db3b8ea7d4d9cba63422654d790880908a1b6 /drivers/acpi | |
parent | 02f57c67a8677ae55dcdd256a2a7abaf41e4cc1f (diff) | |
download | linux-636458de36f1fb4cdd318387d2f45604e451b17a.tar.gz linux-636458de36f1fb4cdd318387d2f45604e451b17a.tar.xz |
ACPI: Remove the arguments of acpi_bus_add() that are not used
Notice that acpi_bus_add() uses only 2 of its 4 arguments and
redefine its header to match the body. Update all of its callers as
necessary and observe that this leads to quite a number of removed
lines of code (Linus will like that).
Add a kerneldoc comment documenting acpi_bus_add() and wonder how
its callers make wrong assumptions about the second argument (make
note to self to take care of that later).
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Toshi Kani <toshi.kani@hp.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r-- | drivers/acpi/acpi_memhotplug.c | 19 | ||||
-rw-r--r-- | drivers/acpi/container.c | 16 | ||||
-rw-r--r-- | drivers/acpi/dock.c | 13 | ||||
-rw-r--r-- | drivers/acpi/processor_driver.c | 24 | ||||
-rw-r--r-- | drivers/acpi/scan.c | 34 |
5 files changed, 26 insertions, 80 deletions
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c index eb30e5ab4cab..d0a7da704d49 100644 --- a/drivers/acpi/acpi_memhotplug.c +++ b/drivers/acpi/acpi_memhotplug.c @@ -157,34 +157,17 @@ static int acpi_memory_get_device(acpi_handle handle, struct acpi_memory_device **mem_device) { - acpi_status status; - acpi_handle phandle; struct acpi_device *device = NULL; - struct acpi_device *pdevice = NULL; int result; - if (!acpi_bus_get_device(handle, &device) && device) goto end; - status = acpi_get_parent(handle, &phandle); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, "Cannot find acpi parent")); - return -EINVAL; - } - - /* Get the parent device */ - result = acpi_bus_get_device(phandle, &pdevice); - if (result) { - acpi_handle_warn(phandle, "Cannot get acpi bus device\n"); - return -EINVAL; - } - /* * Now add the notified device. This creates the acpi_device * and invokes .add function */ - result = acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE); + result = acpi_bus_add(handle, &device); if (result) { acpi_handle_warn(handle, "Cannot add acpi bus\n"); return -EINVAL; diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c index 98b85e3e4781..0688f83bc436 100644 --- a/drivers/acpi/container.c +++ b/drivers/acpi/container.c @@ -135,20 +135,6 @@ static int acpi_container_remove(struct acpi_device *device, int type) return status; } -static int container_device_add(struct acpi_device **device, acpi_handle handle) -{ - acpi_handle phandle; - struct acpi_device *pdev; - - if (acpi_get_parent(handle, &phandle)) - return -ENODEV; - - if (acpi_bus_get_device(phandle, &pdev)) - return -ENODEV; - - return acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_DEVICE); -} - static void container_notify_cb(acpi_handle handle, u32 type, void *context) { struct acpi_device *device = NULL; @@ -180,7 +166,7 @@ static void container_notify_cb(acpi_handle handle, u32 type, void *context) if (!ACPI_FAILURE(status) || device) break; - result = container_device_add(&device, handle); + result = acpi_bus_add(handle, &device); if (result) { acpi_handle_warn(handle, "Failed to add container\n"); break; diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index f32bd47b35e0..ff30582d2e1d 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -310,8 +310,6 @@ static int dock_present(struct dock_station *ds) static struct acpi_device * dock_create_acpi_device(acpi_handle handle) { struct acpi_device *device; - struct acpi_device *parent_device; - acpi_handle parent; int ret; if (acpi_bus_get_device(handle, &device)) { @@ -319,16 +317,9 @@ static struct acpi_device * dock_create_acpi_device(acpi_handle handle) * no device created for this object, * so we should create one. */ - acpi_get_parent(handle, &parent); - if (acpi_bus_get_device(parent, &parent_device)) - parent_device = NULL; - - ret = acpi_bus_add(&device, parent_device, handle, - ACPI_BUS_TYPE_DEVICE); - if (ret) { + ret = acpi_bus_add(handle, &device); + if (ret) pr_debug("error adding bus, %x\n", -ret); - return NULL; - } } return device; } diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index e83311bf1ebd..18b292e12b38 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -677,28 +677,6 @@ static int is_processor_present(acpi_handle handle) return 0; } -static -int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) -{ - acpi_handle phandle; - struct acpi_device *pdev; - - - if (acpi_get_parent(handle, &phandle)) { - return -ENODEV; - } - - if (acpi_bus_get_device(phandle, &pdev)) { - return -ENODEV; - } - - if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { - return -ENODEV; - } - - return 0; -} - static void acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data) { @@ -721,7 +699,7 @@ static void acpi_processor_hotplug_notify(acpi_handle handle, if (!acpi_bus_get_device(handle, &device)) break; - result = acpi_processor_device_add(handle, &device); + result = acpi_bus_add(handle, &device); if (result) { acpi_handle_err(handle, "Unable to add the device\n"); break; diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 6321cab4e5ff..25095bf57bba 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1650,25 +1650,33 @@ static int acpi_bus_scan(acpi_handle handle, bool start, return ret; } -/* - * acpi_bus_add +/** + * acpi_bus_add - Add ACPI device node objects in a given namespace scope. + * @handle: Root of the namespace scope to scan. + * @ret: Location to store a return struct acpi_device pointer. + * + * Scan a given ACPI tree (probably recently hot-plugged) and create and add + * found devices. * - * scan a given ACPI tree and (probably recently hot-plugged) - * create and add found devices. + * If no devices were found, -ENODEV is returned, but it does not mean that + * there has been 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 an + * appropriate driver. * - * 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 an appropriate driver. + * If 0 is returned, the memory location pointed to by @ret will be populated + * with a pointer to a struct acpi_device created while scanning the namespace. + * If @handle corresponds to a device node, that will be a pointer to the struct + * acpi_device object corresponding to @handle. Otherwise, it will be a pointer + * to a struct acpi_device corresponding to one of its descendants. + * + * If an error code is returned, NULL will be stored in the memory location + * pointed to by @ret. */ - -int -acpi_bus_add(struct acpi_device **child, - struct acpi_device *parent, acpi_handle handle, int type) +int acpi_bus_add(acpi_handle handle, struct acpi_device **ret) { int err; - err = acpi_bus_scan(handle, false, child); + err = acpi_bus_scan(handle, false, ret); if (err) return err; |