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0cd6ac52b3
linux/drivers/acpi
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Rafael J. Wysocki 0cd6ac52b3 ACPI: Make acpi_bus_scan() and acpi_bus_add() take only one argument 
The callers of acpi_bus_add() usually assume that if it has
succeeded, then a struct acpi_device object has been attached to
the handle passed as the first argument.  Unfortunately, however,
this assumption is wrong, because acpi_bus_scan(), and acpi_bus_add()
too as a result, may return a pointer to a different struct
acpi_device object on success (it may be an object corresponding to
one of the descendant ACPI nodes in the namespace scope below that
handle).

For this reason, the callers of acpi_bus_add() who care about
whether or not a struct acpi_device object has been created for
its first argument need to check that using acpi_bus_get_device()
anyway, so the second argument of acpi_bus_add() is not really
useful for them.  The same observation applies to acpi_bus_scan()
executed directly from acpi_scan_init().

Therefore modify the relevant callers of acpi_bus_add() to check the
existence of the struct acpi_device in question with the help of
acpi_bus_get_device() and drop the no longer necessary second
argument of acpi_bus_add().  Accordingly, modify acpi_scan_init() to
use acpi_bus_get_device() to get acpi_root and drop the no longer
needed second argument of acpi_bus_scan().

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>
2013-01-03 13:09:40 +01:00
..
acpica Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
apei Trivial fix for error injection code using ACPI5 version of EINJ 2012-12-12 07:54:53 -08:00
ac.c ACPI / PM: Fix unused function warnings for CONFIG_PM_SLEEP 2012-08-10 13:35:32 +02:00
acpi_i2c.c i2c / ACPI: add ACPI enumeration support 2012-11-23 12:23:40 +01:00
acpi_ipmi.c IPMI/ACPI: Add the IPMI opregion driver to enable ACPI to access BMC controller 2010-12-14 00:22:14 -05:00
acpi_memhotplug.c ACPI: Make acpi_bus_scan() and acpi_bus_add() take only one argument 2013-01-03 13:09:40 +01:00
acpi_pad.c ACPI: strict_strtoul() and printk() cleanup in acpi_pad 2012-11-15 00:16:00 +01:00
acpi_platform.c ACPI / platform: include missed header into acpi_platform.c 2012-11-27 13:44:58 +01:00
battery.c ACPI / battery: Correct battery capacity values on Thinkpads 2012-11-16 22:28:58 +01:00
bgrt.c efi: Fix the ACPI BGRT driver for images located in EFI boot services memory 2012-09-29 12:21:03 -07:00
blacklist.c acpi: delete module.h include from files explicitly not needing it 2011-10-31 19:30:33 -04:00
bus.c ACPI / PM: Add check preventing transitioning to non-D0 state from D3. 2012-11-16 02:46:28 +01:00
button.c ACPI/button: convert to module_acpi_driver() 2012-09-21 13:38:29 -04:00
cm_sbs.c
container.c ACPI: Make acpi_bus_scan() and acpi_bus_add() take only one argument 2013-01-03 13:09:40 +01:00
custom_method.c ACPI: Split out custom_method functionality into an own driver 2011-05-29 01:50:40 -04:00
debugfs.c acpi: add export.h to files using THIS_MODULE/EXPORT_SYMBOL 2011-10-31 19:30:34 -04:00
device_pm.c ACPI / PM: Allow attach/detach routines to change device power states 2012-11-26 10:03:06 +01:00
dock.c ACPI: Make acpi_bus_scan() and acpi_bus_add() take only one argument 2013-01-03 13:09:40 +01:00
ec_sys.c simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
ec.c ACPI / EC: Don't count a SCI interrupt as a false one 2012-11-15 00:15:59 +01:00
event.c acpi: add export.h to files using THIS_MODULE/EXPORT_SYMBOL 2011-10-31 19:30:34 -04:00
fan.c ACPI/fan: convert to module_acpi_driver() 2012-09-21 13:39:03 -04:00
glue.c ACPI / driver core: Introduce struct acpi_dev_node and related macros 2012-11-21 00:21:50 +01:00
hed.c Driver core updates for 3.8-rc1 2012-12-11 13:13:55 -08:00
internal.h ACPI: Change the ordering of PCI root bridge driver registrarion 2013-01-03 13:09:37 +01:00
Kconfig Merge branch 'x86-acpi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-12-14 10:03:23 -08:00
Makefile Merge branch 'acpi-dev-pm' into acpi-enumeration 2012-11-27 13:42:42 +01:00
numa.c ACPI: Only count valid srat memory structures 2012-08-03 00:15:53 -04:00
nvs.c ACPI / PM: print physical addresses consistently with other parts of kernel 2012-03-30 02:46:57 -04:00
osl.c Merge branch 'x86-acpi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-12-14 10:03:23 -08:00
pci_bind.c Merge branch 'pci/misc' into next 2012-11-13 14:34:06 -07:00
pci_irq.c PCI changes for the v3.8 merge window: 2012-12-13 12:14:47 -08:00
pci_link.c acpi: use KERN_CONT in printk() continuation lines 2012-05-08 08:55:26 -07:00
pci_root.c ACPI / PCI: Fold acpi_pci_root_start() into acpi_pci_root_add() 2013-01-03 13:09:38 +01:00
pci_slot.c PCI/ACPI: Use acpi_pci_root info rather than looking it up again 2012-09-24 15:29:40 -06:00
power.c ACPI: add newline in power.c message 2012-11-15 00:18:21 +01:00
proc.c ACPI: drop unnecessary local variable from acpi_system_write_wakeup_device() 2012-11-22 23:20:31 +01:00
processor_core.c cpufreq / ACPI: Fix not loading acpi-cpufreq driver regression 2012-07-12 22:39:32 +02:00
processor_driver.c ACPI: Make acpi_bus_scan() and acpi_bus_add() take only one argument 2013-01-03 13:09:40 +01:00
processor_idle.c cpuidle: Measure idle state durations with monotonic clock 2012-11-27 14:17:58 +01:00
processor_perflib.c ACPI: Add fixups for AMD P-state figures 2012-09-09 22:05:02 +02:00
processor_thermal.c ACPI: Do cpufreq clamping for throttling per package v2 2012-03-22 02:16:14 -04:00
processor_throttling.c ACPI throttling: fix endian bug in acpi_read_throttling_status() 2012-03-30 16:06:12 -04:00
reboot.c Revert "ACPI: ignore FADT reset-reg-sup flag" 2012-04-20 11:19:35 -07:00
resource.c ACPI: remove unnecessary INIT_LIST_HEAD 2012-11-27 13:49:36 +01:00
sbs.c ACPI / PM: Fix unused function warnings for CONFIG_PM_SLEEP 2012-08-10 13:35:32 +02:00
sbshc.c ACPI/sbshc: convert to module_acpi_driver() 2012-09-21 13:39:40 -04:00
sbshc.h
scan.c ACPI: Make acpi_bus_scan() and acpi_bus_add() take only one argument 2013-01-03 13:09:40 +01:00
sleep.c Merge branch 'acpi-general' 2012-12-04 13:46:08 +01:00
sleep.h ACPI: static sleep_states[] and acpi_gts_bfs_check 2010-10-19 13:44:37 -04:00
sysfs.c ACPICA: Fix AcpiSrc caused divergences. 2012-11-15 00:31:23 +01:00
tables.c ACPI: Harden acpi_table_parse_entries() against BIOS bug 2012-10-06 15:51:49 -04:00
thermal.c Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2012-12-12 07:57:13 -08:00
utils.c ACPI: Add acpi_handle_<level>() interfaces 2012-11-21 23:20:22 +01:00
video_detect.c ACPI / video: Add "Asus UL30VT" to ACPI video detect blacklist 2012-11-30 13:02:50 +01:00
video.c ACPI / video: ignore BIOS initial backlight value for HP Folio 13-2000 2012-12-04 23:30:19 +01:00
wakeup.c ACPI / Wakeup: Enable button GPEs unconditionally during initialization 2011-02-12 01:39:53 +01:00