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4b9ee772ea
mirror_ubuntu-kernels/drivers/acpi
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Rafael J. Wysocki 4b9ee772ea ACPI: scan: Turn off unused power resources during initialization 
It is reported that on certain platforms there are power resources
that are not associated with any devices physically present in the
platform.  Those power resources are expected to be turned off by
the OS in accordance with the ACPI specification (section 7.3 of
ACPI 6.4) which currently is not done by Linux and that may lead
to obscure issues.

For instance, leaving those power resources in the "on" state may
prevent the platform from reaching the lowest power state in
suspend-to-idle which leads to excessive power draw.

For this reason, turn all of the unused ACPI power resources off
at the end of the initial namespace scan for devices in analogy with
resume from suspend-to-RAM.

Link: https://uefi.org/specs/ACPI/6.4/07_Power_and_Performance_Mgmt/device-power-management-objects.html
Reported-by: David Box <david.e.box@linux.intel.com>
Tested-by: Wendy Wang <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-03-23 18:59:32 +01:00
..
acpica ACPICA: Remove some code duplication from acpi_ev_address_space_dispatch 2021-02-19 16:03:25 +01:00
apei ACPI: APEI: ERST: remove unneeded semicolon 2021-02-05 13:50:51 +01:00
arm64 ACPI/IORT: Do not blindly trust DMA masks from firmware 2021-01-27 12:26:24 +00:00
dptf ACPI: DPTF: Support Alder Lake 2020-11-10 18:52:51 +01:00
nfit ACPI: NFIT: Fix flexible_array.cocci warnings 2021-01-11 12:56:49 -08:00
numa ACPI updates for 5.10-rc1 2020-10-14 11:42:04 -07:00
pmic ACPI / PMIC: Move TPS68470 OpRegion driver to drivers/acpi/pmic/ 2020-09-15 19:40:59 +02:00
x86 ACPI: PM: s2idle: Drop unused local variables and related code 2021-01-07 17:41:28 +01:00
ac.c ACPI: AC: Clean up printing messages 2021-02-04 19:45:45 +01:00
acpi_adxl.c ACPI/ADXL: Add address translation interface using an ACPI DSM 2018-10-16 10:03:00 +02:00
acpi_amba.c Merge 5.2-rc6 into char-misc-next 2019-06-23 09:23:33 +02:00
acpi_apd.c ACPI: APD: Clean up header file include statements 2020-09-25 12:48:11 +02:00
acpi_cmos_rtc.c ACPI: cmos_rtc: Remove leftover ACPI_MODULE_NAME() 2020-09-25 18:25:51 +02:00
acpi_configfs.c ACPI: configfs: add missing check after configfs_register_default_group() 2021-01-22 16:35:34 +01:00
acpi_dbg.c ACPI: debug: Remove the not used function 2020-11-17 18:12:34 +01:00
acpi_extlog.c ACPI / extlog: Check for RDMSR failure 2020-10-02 19:01:55 +02:00
acpi_fpdt.c ACPI: tables: introduce support for FPDT table 2021-01-29 19:24:13 +01:00
acpi_ipmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
acpi_lpat.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
acpi_lpit.c ACPI: LPIT: Put the low power idle table after using it 2020-05-09 11:29:16 +02:00
acpi_lpss.c drm next for 5.10-rc1 2020-10-15 10:46:16 -07:00
acpi_memhotplug.c mm/memory_hotplug: prepare passing flags to add_memory() and friends 2020-10-16 11:11:18 -07:00
acpi_pad.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-01-22 16:17:19 +01:00
acpi_platform.c ACPI: platform: Remove ACPI_MODULE_NAME() 2020-09-25 18:25:51 +02:00
acpi_pnp.c ACPI: PNP: compare the string length in the matching_id() 2020-12-15 19:30:49 +01:00
acpi_processor.c ACPI: processor: remove comment regarding string _UID support 2020-10-16 18:11:27 +02:00
acpi_tad.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-01-22 16:17:19 +01:00
acpi_video.c ACPI: video: Clean up printing messages 2021-02-04 19:45:46 +01:00
acpi_watchdog.c ACPI: watchdog: Replace open coded variant of resource_union() 2020-11-17 18:06:29 +01:00
battery.c ACPI: battery: Clean up printing messages 2021-02-04 19:45:45 +01:00
bgrt.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-01-22 16:17:19 +01:00
blacklist.c ACPI: blacklist: fix clang warning for unused DMI table 2019-07-11 22:45:00 +02:00
bus.c ACPI updates for 5.12-rc1 2021-02-20 21:50:59 -08:00
button.c ACPI: button: Clean up printing messages 2021-02-04 19:45:46 +01:00
container.c ACPI: container: Remove leftover ACPICA debug functionality 2020-09-25 18:25:51 +02:00
cppc_acpi.c ACPI: CPPC: initialise vaddr pointers to NULL 2021-01-22 16:28:19 +01:00
custom_method.c ACPI: custom_method: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
debugfs.c ACPI: debugfs: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
device_pm.c ACPI: PM: Clean up printing messages 2021-02-04 19:11:43 +01:00
device_sysfs.c Merge branches 'acpi-misc', 'acpi-cppc', 'acpi-docs', 'acpi-config' and 'acpi-apei' 2021-02-15 17:04:40 +01:00
dock.c ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros 2021-01-22 16:17:19 +01:00
ec_sys.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482 2019-06-19 17:09:52 +02:00
ec.c ACPI: EC: Clean up status flags checks in advance_transaction() 2020-11-23 20:01:01 +01:00
event.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
evged.c ACPI: GED: fix -Wformat 2020-11-09 19:25:20 +01:00
fan.c ACPI: fan: Initialize performance state sysfs attribute 2020-11-16 15:18:38 +01:00
glue.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
hed.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
internal.h ACPI: scan: Turn off unused power resources during initialization 2021-03-23 18:59:32 +01:00
ioapic.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
irq.c Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-07-08 11:01:13 -07:00
Kconfig Merge branch 'acpi-tables' 2021-02-25 18:57:40 +01:00
Makefile Merge branch 'acpi-tables' 2021-02-25 18:57:40 +01:00
nvs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
osi.c ACPI: OSI: Shoot duplicate word 2019-11-13 11:12:08 +01:00
osl.c ACPI: OSL: Clean up printing messages 2021-02-10 19:09:43 +01:00
pci_irq.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
pci_link.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
pci_mcfg.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
pci_root.c PCI/ACPI: Clarify message about _OSC failure 2021-01-27 09:38:36 -06:00
pci_slot.c ACPI: PCI: Remove unused ACPICA debug code 2020-09-25 18:25:51 +02:00
platform_profile.c ACPI: platform: Add balanced-performance platform profile 2021-02-24 14:52:41 +01:00
power.c ACPI: scan: Turn off unused power resources during initialization 2021-03-23 18:59:32 +01:00
pptt.c ACPI: PPTT: Consistently use unsigned int as parameter type 2020-01-07 11:46:36 +01:00
proc.c ACPI: proc: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
processor_core.c ACPI: processor: Remove dead ACPICA debug code 2020-09-25 18:25:51 +02:00
processor_driver.c cpufreq: Use per-policy frequency QoS 2019-10-21 02:05:21 +02:00
processor_idle.c ACPI: processor: Remove the duplicated ACPI_PROCESSOR_CLASS macro 2020-11-17 18:12:34 +01:00
processor_pdc.c
processor_perflib.c More power management updates for 5.11-rc1 2020-12-22 14:12:10 -08:00
processor_thermal.c ACPI: processor: Remove the duplicated ACPI_PROCESSOR_CLASS macro 2020-11-17 18:12:34 +01:00
processor_throttling.c ACPI: processor: Remove the duplicated ACPI_PROCESSOR_CLASS macro 2020-11-17 18:12:34 +01:00
property.c ACPI: property: Satisfy kernel doc validator (part 2) 2021-02-12 15:34:14 +01:00
reboot.c ACPI: reboot: Avoid racing after writing to ACPI RESET_REG 2020-10-16 18:04:52 +02:00
resource.c ACPI updates for 5.11-rc1 2020-12-15 16:39:06 -08:00
sbs.c ACPI: SBS: Simplify the code using module_acpi_driver() 2020-11-17 18:12:34 +01:00
sbshc.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
sbshc.h ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00
scan.c ACPI: scan: Turn off unused power resources during initialization 2021-03-23 18:59:32 +01:00
sleep.c ACPI: PM: s2idle: Move x86-specific code to the x86 directory 2020-12-17 20:30:02 +01:00
sleep.h ACPI: scan: Turn off unused power resources during initialization 2021-03-23 18:59:32 +01:00
spcr.c ACPI: Use fallthrough pseudo-keyword 2020-07-09 14:09:28 +02:00
sysfs.c ACPI: thermal: Clean up printing messages 2021-02-04 19:45:46 +01:00
tables.c ACPI: tables: Remove the duplicated checks for acpi_parse_entries_array() 2020-07-27 15:19:12 +02:00
thermal.c - Use the newly introduced 'hot' and 'critical' ops for the acpi 2021-02-22 09:39:11 -08:00
tiny-power-button.c ACPI: tiny-power-button: Simplify the code using module_acpi_driver() 2020-11-17 18:12:34 +01:00
utils.c media updates for v5.12-rc1 2021-02-21 14:10:36 -08:00
video_detect.c ACPI: video: Add DMI quirk for GIGABYTE GB-BXBT-2807 2020-12-07 14:01:22 +01:00
wakeup.c ACPI: Fix whitespace inconsistencies 2020-11-09 19:08:06 +01:00