1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/acpi/processor_pdc.c b/drivers/acpi/processor_pdc.c
index 7247819dbd80..e306ba9aa34e 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;
@@ -151,6 +156,13 @@ static int set_early_pdc_optin(const struct dmi_system_id *id)
         return 0;
 }
 
+static int param_early_pdc_optin(char *s)
+{
+        early_pdc_optin = 1;
+        return 1;
+}
+__setup("acpi_early_pdc_eval", param_early_pdc_optin);
+
 static struct dmi_system_id __cpuinitdata early_pdc_optin_table[] = {
         {
         set_early_pdc_optin, "HP Envy", {
@@ -192,4 +204,6 @@ 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);
+
+        early_pdc_done = 1;
 }