[CPUFREQ] Prevents un-necessary cpufreq changes if we are already at min/max
Signed-off-by: Alexander Clouter <alex-kernel@digriz.org.uk> Signed-off-by: Dave Jones <davej@redhat.com>
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@ -333,6 +333,10 @@ static void dbs_check_cpu(int cpu)
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usecs_to_jiffies(dbs_tuners_ins.sampling_rate);
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if (idle_ticks < up_idle_ticks) {
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/* if we are already at full speed then break out early */
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if (policy->cur == policy->max)
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return;
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__cpufreq_driver_target(policy, policy->max,
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CPUFREQ_RELATION_H);
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down_skip[cpu] = 0;
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@ -386,6 +390,10 @@ static void dbs_check_cpu(int cpu)
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usecs_to_jiffies(freq_down_sampling_rate);
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if (idle_ticks > down_idle_ticks ) {
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/* if we are already at the lowest speed then break out early */
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if (policy->cur == policy->min)
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return;
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freq_down_step = (5 * policy->max) / 100;
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/* max freq cannot be less than 100. But who knows.... */
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