[PATCH 2/2] ACPI: processor: only evaluate _PDC once per processor

[Alex Chiang <achiang@hp.com>]

If we evaluate _PDC in the early path, we do not want to evaluate
it again when the processor driver is loaded.

Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
---

 drivers/acpi/processor_pdc.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/processor_pdc.c b/drivers/acpi/processor_pdc.c
index 2944e7d..54f0214 100644
--- a/drivers/acpi/processor_pdc.c
+++ b/drivers/acpi/processor_pdc.c
@@ -125,6 +125,8 @@ acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in)
 	return status;
 }
 
+static int early_pdc_done;
+
 void acpi_processor_set_pdc(acpi_handle handle)
 {
 	struct acpi_object_list *obj_list;
@@ -132,6 +134,9 @@ void acpi_processor_set_pdc(acpi_handle handle)
 	if (arch_has_acpi_pdc() == false)
 		return;
 
+	if (early_pdc_done)
+		return;
+
 	obj_list = acpi_processor_alloc_pdc();
 	if (!obj_list)
 		return;
@@ -199,4 +204,6 @@ void acpi_early_processor_set_pdc(void)
 	acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
 			    ACPI_UINT32_MAX,
 			    early_init_pdc, NULL, NULL, NULL);
+
+	early_pdc_done = 1;
 }