From c11420a616039e2181e4ecbffb4d125d39e6877d Mon Sep 17 00:00:00 2001 From: Dave Jones Date: Tue, 31 May 2005 19:03:48 -0700 Subject: [PATCH] [CPUFREQ] Prevents un-necessary cpufreq changes if we are already at min/max Signed-off-by: Alexander Clouter Signed-off-by: Dave Jones --- drivers/cpufreq/cpufreq_ondemand.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index 7d7244314ac9..6dc83808e590 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -333,6 +333,10 @@ static void dbs_check_cpu(int cpu) usecs_to_jiffies(dbs_tuners_ins.sampling_rate); if (idle_ticks < up_idle_ticks) { + /* if we are already at full speed then break out early */ + if (policy->cur == policy->max) + return; + __cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H); down_skip[cpu] = 0; @@ -386,6 +390,10 @@ static void dbs_check_cpu(int cpu) usecs_to_jiffies(freq_down_sampling_rate); if (idle_ticks > down_idle_ticks ) { + /* if we are already at the lowest speed then break out early */ + if (policy->cur == policy->min) + return; + freq_down_step = (5 * policy->max) / 100; /* max freq cannot be less than 100. But who knows.... */ -- 2.20.1