From: Dave Jones Date: Wed, 1 Jun 2005 02:03:48 +0000 (-0700) Subject: [CPUFREQ] Prevents un-necessary cpufreq changes if we are already at min/max X-Git-Tag: v2.6.12-rc6~53 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c11420a616039e2181e4ecbffb4d125d39e6877d;p=platform%2Fupstream%2Fkernel-adaptation-pc.git [CPUFREQ] Prevents un-necessary cpufreq changes if we are already at min/max Signed-off-by: Alexander Clouter Signed-off-by: Dave Jones --- diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index 7d72443..6dc8380 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.... */