[PATCH linux-next] cpufreq: conservative: Fix sampling_down_factor functionality

[Stratos Karafotis <stratosk@semaphore.gr>]

sampling_down_factor tunable is unused since commit
8e677ce83bf41ba9c74e5b6d9ee60b07d4e5ed93 (4 years ago).

This patch restores the original functionality.

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
---
 drivers/cpufreq/cpufreq_conservative.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index 4fd0006..4b27c21 100644
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -87,6 +87,12 @@ static void cs_check_cpu(int cpu, unsigned int load)
                return;
        }

+       /* if sampling_down_factor is active break out early */
+       if (++dbs_info->down_skip < cs_tuners.sampling_down_factor)
+               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
-- 
1.8.1.4