Commit c1e0ddbf authored Sep 17, 2010 by Yinghai Lu Committed by Len Brown Oct 01, 2010

ACPI: Handle ACPI0007 Device in acpi_early_set_pdc



After
| commit d8191fa4
| Author: Alex Chiang <achiang@hp.com>
| Date:   Mon Feb 22 12:11:39 2010 -0700
|
|    ACPI: processor: driver doesn't need to evaluate _PDC
|
|    Now that the early _PDC evaluation path knows how to correctly
|    evaluate _PDC on only physically present processors, there's no
|    need for the processor driver to evaluate it later when it loads.
|
|    To cover the hotplug case, push _PDC evaluation down into the
|    hotplug paths.

only cpu with Processor Statement get processed with _PDC

If bios is using Device object instead of Processor statement.
SSDTs for Pstate/Cstate/Tstate can not be loaded dynamically.

Need to try to scan ACPI0007 in addition to Processor.

That commit is between 2.6.34-rc1 and 2.6.34-rc2, so stable tree for 2.6.34+
need this patch.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Reviewed-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

parent 899611ee

drivers/acpi/processor_core.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -352,4 +352,5 @@ void __init acpi_early_processor_set_pdc(void)
		acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
		ACPI_UINT32_MAX,
		early_init_pdc, NULL, NULL, NULL);
		acpi_get_devices("ACPI0007", early_init_pdc, NULL, NULL);
		}