cpuidle: teo: Get rid of redundant check in teo_update()

Notice that setting measured_us to UINT_MAX in teo_update() earlier
doesn't change the behavior of the following code, so do that and
eliminate a redundant check used for setting measured_us to UINT_MAX.

This change is not expected to alter functionality.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpuidle/governors/teo.c b/drivers/cpuidle/governors/teo.c
index 4d7a60c..b5a0e49 100644 (file)
--- a/drivers/cpuidle/governors/teo.c
+++ b/drivers/cpuidle/governors/teo.c
@@ -123,10 +123,11 @@ static void teo_update(struct cpuidle_driver *drv, struct cpuidle_device *dev)
 
        if (cpu_data->time_span_ns >= cpu_data->sleep_length_ns) {
                /*
-                * One of the safety nets has triggered or this was a timer
-                * wakeup (or equivalent).
+                * One of the safety nets has triggered or the wakeup was close
+                * enough to the closest timer event expected at the idle state
+                * selection time to be discarded.
                 */
-               measured_us = sleep_length_us;
+               measured_us = UINT_MAX;
        } else {
                unsigned int lat;
 
@@ -188,15 +189,6 @@ static void teo_update(struct cpuidle_driver *drv, struct cpuidle_device *dev)
                cpu_data->states[idx_timer].hits = hits;
        }
 
-       /*
-        * If the total time span between idle state selection and the "reflect"
-        * callback is greater than or equal to the sleep length determined at
-        * the idle state selection time, the wakeup is likely to be due to a
-        * timer event.
-        */
-       if (cpu_data->time_span_ns >= cpu_data->sleep_length_ns)
-               measured_us = UINT_MAX;
-
        /*
         * Save idle duration values corresponding to non-timer wakeups for
         * pattern detection.