On Saturday, December 27, 2014 09:19:49 AM Pali Rohár wrote:
> Hello,
>
> in attachment is output of ls -l /sys/bus/acpi/devices from both
> 3.13 and 3.19 kernels.
>
> Anyway Gabriele Mazzotta wrote me that new acpi devices could be
> created after commit faae404ebdc6bba (ACPICA: Add "Windows 2013"
> string to _OSI support).
>
> Maybe this another output could help you:
>
> $ cat /sys/bus/acpi/devices/INT33C5\:00/status
> 0
> $ cat /sys/bus/acpi/devices/INT33C5\:00/power_state
> (unknown)
>
> Device INT33C5 is in that dmesg log:
> acpi INT33C5:00: Cannot transition to non-D0 state from D3
The appended patch should make these messages go away, please test.
> And status 0 in sysnode could indicate that acpi device is not
> present right?
That's correct.
---
drivers/acpi/device_pm.c | 7 ++++---
include/acpi/acpi_bus.h | 3 ++-
2 files changed, 6 insertions(+), 4 deletions(-)
Index: linux-pm/include/acpi/acpi_bus.h
===================================================================
--- linux-pm.orig/include/acpi/acpi_bus.h
+++ linux-pm/include/acpi/acpi_bus.h
@@ -589,7 +589,8 @@ static inline u32 acpi_target_system_sta
static inline bool acpi_device_power_manageable(struct acpi_device *adev)
{
- return adev->flags.power_manageable;
+ return adev->flags.power_manageable
+ && (adev->status.present || adev->status.functional);
}
static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
Index: linux-pm/drivers/acpi/device_pm.c
===================================================================
--- linux-pm.orig/drivers/acpi/device_pm.c
+++ linux-pm/drivers/acpi/device_pm.c
@@ -68,7 +68,8 @@ int acpi_device_get_power(struct acpi_de
{
int result = ACPI_STATE_UNKNOWN;
- if (!device || !state)
+ if (!device || !state
+ || !(device->status.present || device->status.functional))
return -EINVAL;
if (!device->flags.power_manageable) {
@@ -156,7 +157,7 @@ int acpi_device_set_power(struct acpi_de
int result = 0;
bool cut_power = false;
- if (!device || !device->flags.power_manageable
+ if (!device || !acpi_device_power_manageable(device)
|| (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
return -EINVAL;
@@ -361,7 +362,7 @@ bool acpi_bus_power_manageable(acpi_hand
int result;
result = acpi_bus_get_device(handle, &device);
- return result ? false : device->flags.power_manageable;
+ return result ? false : acpi_device_power_manageable(device);
}
EXPORT_SYMBOL(acpi_bus_power_manageable);
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