cpufreq: conservative: Fix the logic in frequency decrease checking

When we evaluate the CPU load for frequency decrease we have to compare
the load against down_threshold. There is no need to subtract 10 points
from down_threshold.

Instead, we have to use the default down_threshold or user's selection
unmodified.

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index d746d6a..0d6a9e5 100644 (file)
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -86,12 +86,8 @@ static void cs_check_cpu(int cpu, unsigned int load)
                return;
        dbs_info->down_skip = 0;
 
-       /*
-        * The optimal frequency is the frequency that is the lowest that can
-        * support the current CPU usage without triggering the up policy. To be
-        * safe, we focus 10 points under the threshold.
-        */
-       if (load < (cs_tuners->down_threshold - 10)) {
+       /* Check for frequency decrease */
+       if (load < cs_tuners->down_threshold) {
                /*
                 * if we cannot reduce the frequency anymore, break out early
                 */