cpuidle: add a sysfs entry to disable specific C state for debug purpose.

[pandora-kernel.git] / drivers / cpuidle / governors / menu.c

diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c
index ad09526..5c17ca1 100644 (file)
--- a/drivers/cpuidle/governors/menu.c
+++ b/drivers/cpuidle/governors/menu.c
@@ -280,7 +280,8 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev)
         * We want to default to C1 (hlt), not to busy polling
         * unless the timer is happening really really soon.
         */
-       if (data->expected_us > 5)
+       if (data->expected_us > 5 &&
+               drv->states[CPUIDLE_DRIVER_STATE_START].disable == 0)
                data->last_state_idx = CPUIDLE_DRIVER_STATE_START;
 
        /*
@@ -290,6 +291,8 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev)
        for (i = CPUIDLE_DRIVER_STATE_START; i < drv->state_count; i++) {
                struct cpuidle_state *s = &drv->states[i];
 
+               if (s->disable)
+                       continue;
                if (s->target_residency > data->predicted_us)
                        continue;
                if (s->exit_latency > latency_req)