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ACPI / PM: Support D3 COLD device in old BIOS for ZPODD
D3cold is only regarded as valid if the "_PR3" object is present for the given device after the commit 20dacb71ad28 ("ACPI/PM: Rework device power management to follow ACPI 6"). But some old BIOS only defined "_PS3" for the D3COLD device, such as ZPODD device. And old kernel also believes the device with "_PS3" is a D3COLD device. So, add some logics for supporting D3 COLD device with old BIOS which is compatible with earlier ACPI spec and kernel behavior. Link: http://marc.info/?l=linux-acpi&m=144946938709759&w=2 Signed-off-by: Ken Xue <Ken.Xue@amd.com> Reported-and-tested-by: Gang Long <Gang.Long@amd.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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@ -631,7 +631,9 @@ static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
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static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
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{
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return adev->power.states[ACPI_STATE_D3_COLD].flags.valid;
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return adev->power.states[ACPI_STATE_D3_COLD].flags.valid ||
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((acpi_gbl_FADT.header.revision < 6) &&
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adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set);
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}
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#else /* CONFIG_ACPI */
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