1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index 8bc38ab96400..c1fc9c62bb51 100644
--- 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);