Merge branch 'pm-cpuidle'

* pm-cpuidle:
  PM / suspend: Always use deepest C-state in the "freeze" sleep state
  cpuidle / menu: move repeated correction factor check to init
  cpuidle / menu: Return (-1) if there are no suitable states
  cpuidle: Combine cpuidle_enabled() with cpuidle_select()
  ARM: clps711x: Add cpuidle driver

2 files changed, 9 insertions, 13 deletions

diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 8233cd4047d7..155721f7f909 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -54,9 +54,11 @@ static void freeze_begin(void)
 
 static void freeze_enter(void)
 {
+        cpuidle_use_deepest_state(true);
         cpuidle_resume();
         wait_event(suspend_freeze_wait_head, suspend_freeze_wake);
         cpuidle_pause();
+        cpuidle_use_deepest_state(false);
 }
 
 void freeze_wake(void)
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index 8f4390a079c7..a8f12247ce7c 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -101,19 +101,13 @@ static int cpuidle_idle_call(void)
         rcu_idle_enter();
 
         /*
-         * Check if the cpuidle framework is ready, otherwise fallback
-         * to the default arch specific idle method
+         * Ask the cpuidle framework to choose a convenient idle state.
+         * Fall back to the default arch specific idle method on errors.
          */
-        ret = cpuidle_enabled(drv, dev);
-
-        if (!ret) {
-                /*
-                 * Ask the governor to choose an idle state it thinks
-                 * it is convenient to go to. There is *always* a
-                 * convenient idle state
-                 */
-                next_state = cpuidle_select(drv, dev);
+        next_state = cpuidle_select(drv, dev);
 
+        ret = next_state;
+        if (ret >= 0) {
                 /*
                  * The idle task must be scheduled, it is pointless to
                  * go to idle, just update no idle residency and get
@@ -140,7 +134,7 @@ static int cpuidle_idle_call(void)
                                         CLOCK_EVT_NOTIFY_BROADCAST_ENTER,
                                         &dev->cpu);
 
-                        if (!ret) {
+                        if (ret >= 0) {
                                 trace_cpu_idle_rcuidle(next_state, dev->cpu);
 
                                 /*
@@ -175,7 +169,7 @@ static int cpuidle_idle_call(void)
          * We can't use the cpuidle framework, let's use the default
          * idle routine
          */
-        if (ret)
+        if (ret < 0)
                 arch_cpu_idle();
 
         __current_set_polling();