linux/drivers/base
Rafael J. Wysocki 863f9f30e6 ACPI / platform: Initialize ACPI handles of platform devices in advance
The current platform device creation and registration code in
acpi_create_platform_device() is quite convoluted.  This function
takes an ACPI device node as an argument and eventually calls
platform_device_register_resndata() to create and register a
platform device object on the basis of the information contained
in that code.  However, it doesn't associate the new platform
device with the ACPI node directly, but instead it relies on
acpi_platform_notify(), called from within device_add(), to find
that ACPI node again with the help of acpi_platform_find_device()
and acpi_platform_match() and then attach the new platform device
to it.  This causes an additional ACPI namespace walk to happen and
is clearly suboptimal.

Use the observation that it is now possible to initialize the ACPI
handle of a device before calling device_add() for it to make this
code more straightforward.  Namely, add a new field to struct
platform_device_info allowing us to pass the ACPI handle of interest
to platform_device_register_full(), which will then use it to
initialize the new device's ACPI handle before registering it.
This will cause acpi_platform_notify() to use the ACPI handle from
the device structure directly instead of using the .find_device()
routine provided by the device's bus type.  In consequence,
acpi_platform_bus, acpi_platform_find_device(), and
acpi_platform_match() are not necessary any more, so remove them.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-21 00:21:59 +01:00
..
power PM / Domains: Fix memory leak on error path in pm_genpd_attach_cpuidle 2012-10-23 00:54:38 +02:00
regmap regmap: select REGMAP if REGMAP_MMIO and REGMAP_IRQ enabled 2012-10-17 22:09:35 +09:00
attribute_container.c
base.h
bus.c
class.c
core.c device and dynamic_debug: Use dev_vprintk_emit and dev_printk_emit 2012-09-17 06:10:05 -07:00
cpu.c
dd.c
devres.c driver core: devres: introduce devres_for_each_res 2012-08-16 13:30:29 -07:00
devtmpfs.c userns: Convert devtmpfs to use GLOBAL_ROOT_UID and GLOBAL_ROOT_GID 2012-09-21 03:13:05 -07:00
dma-buf.c make get_file() return its argument 2012-09-26 21:10:25 -04:00
dma-coherent.c drivers: dma-coherent: Fix typo in dma_mmap_from_coherent documentation 2012-10-23 14:05:32 +02:00
dma-contiguous.c drivers: dma-contiguous: Don't redefine SZ_1M 2012-10-23 14:05:32 +02:00
dma-mapping.c common: dma-mapping: introduce dma_get_sgtable() function 2012-07-30 12:25:46 +02:00
driver.c
firmware_class.c firmware loader: sync firmware cache by async_synchronize_full_domain 2012-10-22 08:37:18 -07:00
firmware.c
hypervisor.c
init.c
isa.c
Kconfig drivers: cma: Fix wrong CMA selected region size default value 2012-10-23 14:05:33 +02:00
Makefile
map.c
memory.c memory-hotplug: update memory block's state and notify userspace 2012-10-09 16:23:02 +09:00
module.c
node.c
platform.c ACPI / platform: Initialize ACPI handles of platform devices in advance 2012-11-21 00:21:59 +01:00
soc.c
syscore.c
topology.c
transport_class.c