From: Yinghai Lu <yinghai@xxxxxxxxxx>
upstream c1e0ddbf0a97e1704d7f13b4934f9acca002402d
After
| commit d8191fa4a33fdc817277da4f2b7f771ff605a41c
| Author: Alex Chiang <achiang@xxxxxx>
| 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@xxxxxxxxxx>
Reviewed-by: Bjorn Helgaas <bjorn.helgaas@xxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
---
drivers/acpi/processor_core.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index e9699aa..df6e167 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -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);
}
--
1.7.3.1.120.g38a18
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