2 files changed, 13 insertions, 7 deletions

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index a898991f77cb..a8634a0655fc 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -969,11 +969,17 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr,
         }
 
         if (pr->flags.bm_check) {
-                /* bus mastering control is necessary */
                 if (!pr->flags.bm_control) {
-                        /* In this case we enter C3 without bus mastering */
-                        ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-                                "C3 support without bus mastering control\n"));
+                        if (pr->flags.has_cst != 1) {
+                                /* bus mastering control is necessary */
+                                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                                        "C3 support requires BM control\n"));
+                                return;
+                        } else {
+                                /* Here we enter C3 without bus mastering */
+                                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                                        "C3 support without BM control\n"));
+                        }
                 }
         } else {
                 /*
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index c4efc0c17f8f..463b0247cbc5 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -539,7 +539,7 @@ end:
 }
 
 int acpi_processor_preregister_performance(
-                struct acpi_processor_performance **performance)
+                struct acpi_processor_performance *performance)
 {
         int count, count_target;
         int retval = 0;
@@ -567,12 +567,12 @@ int acpi_processor_preregister_performance(
                         continue;
                 }
 
-                if (!performance || !performance[i]) {
+                if (!performance || !percpu_ptr(performance, i)) {
                         retval = -EINVAL;
                         continue;
                 }
 
-                pr->performance = performance[i];
+                pr->performance = percpu_ptr(performance, i);
                 cpu_set(i, pr->performance->shared_cpu_map);
                 if (acpi_processor_get_psd(pr)) {
                         retval = -EINVAL;