diff options
| author | Ken Xue <Ken.Xue@amd.com> | 2015-12-09 16:17:30 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-12-09 23:36:22 +0100 |
| commit | cd7f84c02825cfca6cc86826395167479bdc1a05 (patch) | |
| tree | c0e691f234e12a75a928c30aeb0dfd05a3c2c28b /include | |
| parent | 527e9316f8ec44bd53d90fb9f611fa7ffff52bb9 (diff) | |
| download | lwn-cd7f84c02825cfca6cc86826395167479bdc1a05.tar.gz lwn-cd7f84c02825cfca6cc86826395167479bdc1a05.zip | |
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/acpi/acpi_bus.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index ad0a5ff3d4cd..9894b752cbb1 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -631,7 +631,9 @@ static inline bool acpi_device_can_wakeup(struct acpi_device *adev) static inline bool acpi_device_can_poweroff(struct acpi_device *adev) { - return adev->power.states[ACPI_STATE_D3_COLD].flags.valid; + return adev->power.states[ACPI_STATE_D3_COLD].flags.valid || + ((acpi_gbl_FADT.header.revision < 6) && + adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set); } #else /* CONFIG_ACPI */ |