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a2367807b8
linux/drivers/acpi
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Rafael J. Wysocki a2367807b8 ACPI / PM: Make acpi_bus_init_power() more robust 
The ACPI specification requires the _PSC method to be present under
a device object if its power state cannot be inferred from the states
of power resources used by it (ACPI 5, Section 7.6.2).  However, it
also requires that (for power states D0-D2 and D3hot) if the _PSn
(n = 0, 1, 2, 3) method is present under the device object, it also
must be executed after the power resources have been set
appropriately for the device to go into power state Dn (D3 means
D3hot in this case).  Thus it is not clear from the specification
whether or not the _PSn method should be executed if the initial
configuraion of power resources used by the device indicates power
state Dn and the _PSC method is not present.

The current implementation of acpi_bus_init_power() is based on the
assumption that it should not be necessary to execute _PSn in the
above situation, but experience shows that in fact that assumption
need not be satisfied.  For this reason, make acpi_bus_init_power()
always execute _PSn if the initial configuration of device power
resources indicates power state Dn.

Reported-and-tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-01-22 12:54:38 +01:00
..
acpica ACPICA: Remove useless mini-C library. 2013-01-03 13:09:10 +01:00
apei ACPI / APEI: Fix the returned value in erst_dbg_read 2013-01-03 13:10:20 +01:00
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 Merge branch 'acpi-scan' into acpi-pm 2013-01-17 14:10:27 +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: Move device power management functions to device_pm.c 2013-01-19 22:09:22 +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: Make acpi_bus_init_power() more robust 2013-01-22 12:54:38 +01:00
dock.c ACPI / scan: Drop the second argument of acpi_bus_trim() 2013-01-15 13:23:53 +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 Merge branch 'acpi-scan' into acpi-pm 2013-01-17 14:10:27 +01:00
hed.c Driver core updates for 3.8-rc1 2012-12-11 13:13:55 -08:00
internal.h ACPI / PM: Move device power management functions to device_pm.c 2013-01-19 22:09:22 +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 ACPI / PCI: Move the _PRT setup and cleanup code to pci-acpi.c 2013-01-03 13:09:41 +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_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: Move the _PRT setup and cleanup code to pci-acpi.c 2013-01-03 13:09:41 +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: Use system level attribute of wakeup power resources 2013-01-17 14:11:07 +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: update ej_event interface to take acpi_device 2013-01-15 13:24:59 +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: Use system level attribute of wakeup power resources 2013-01-17 14:11:07 +01:00
sleep.c ACPI / PM: Consolidate suspend-specific and hibernate-specific code 2013-01-19 22:09:23 +01:00
sleep.h ACPI: Drop power resources driver 2013-01-17 14:11:06 +01:00
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