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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-03-18 21:28:28 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-03-23 21:40:28 +0300 |
| commit | 7e4fdeafa61f2b653fcf9678f09935e55756aed2 (patch) | |
| tree | a281388cac429863a03305dba2c99cae11fb81a4 /include | |
| parent | 4b9ee772eaa82188b0eb8e05bdd1707c2a992004 (diff) | |
| download | linux-7e4fdeafa61f2b653fcf9678f09935e55756aed2.tar.xz | |
ACPI: power: Turn off unused power resources unconditionally
According to the ACPI specification (section 7.2.2 in ACPI 6.4), the
OS may evaluate the _OFF method of a power resource that is "off"
already [1], and in particular that can be done in the case of unused
power resources.
Accordingly, modify acpi_turn_off_unused_power_resources() to
evaluate the _OFF method for each of the unused power resources
unconditionally which may help to work around BIOS issues where the
return value of _STA for a power resource does not reflect the
actual state of the power resource [2].
Link: https://uefi.org/specs/ACPI/6.4/07_Power_and_Performance_Mgmt/declaring-a-power-resource-object.html#off # [1]
Link: https://lore.kernel.org/lkml/20210314000439.3138941-1-luzmaximilian@gmail.com/ # [2]
Tested-by: Wendy Wang <wendy.wang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include')
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