Hi, all,
Maybe the incorrect power state is returned on the bogus bios,
which is different with the real power state. For example: the bios returns D0
state and the real power state is D3. OS expects to set the device to D0
state. In such case if OS uses the power state returned by the BIOS and checks the device
power state very strictly in power transition, the device can't be transited to the
correct power state.
This following patch series is to disable the power state check in device
power transition.
Patch 01:
Attach the ACPI device to the ACPI handle as early as possible
Patch02:
Get the device power state in the course of scanning device:
Patch 03:
Add "acpi.power_nocheck=1" to disable power state check in power transition
Patch 04:
Add DMI check to disable power check in power transition
Thanks for the review.
Yakui
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