[CPUFREQ] ondemand governor default sampling downfactor as 1

[PATCH] [5/5] ondemand governor default sampling downfactor as 1

Make default sampling downfactor 1.
This works better with earlier auto downscaling change in ondemand governor.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Dave Jones <davej@redhat.com>

diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index 8bc38ab..c1fc9c6 100644 (file)
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -51,7 +51,8 @@ static unsigned int                           def_sampling_rate;
 #define MIN_SAMPLING_RATE                      (def_sampling_rate / 2)
 #define MAX_SAMPLING_RATE                      (500 * def_sampling_rate)
 #define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER   (1000)
-#define DEF_SAMPLING_DOWN_FACTOR               (10)
+#define DEF_SAMPLING_DOWN_FACTOR               (1)
+#define MAX_SAMPLING_DOWN_FACTOR               (10)
 #define TRANSITION_LATENCY_LIMIT               (10 * 1000)
 
 static void do_dbs_timer(void *data);
@@ -129,6 +130,9 @@ static ssize_t store_sampling_down_factor(struct cpufreq_policy *unused,
        if (ret != 1 )
                return -EINVAL;
 
+       if (input > MAX_SAMPLING_DOWN_FACTOR || input < 1)
+               return -EINVAL;
+
        down(&dbs_sem);
        dbs_tuners_ins.sampling_down_factor = input;
        up(&dbs_sem);