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cpufreq: Avoid calling cpufreq driver's target() routine if target_freq == policy->cur

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Avoid calling cpufreq driver's target() routine if new frequency is same as
policies current frequency.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2012-10-31 01:28:15 +01:00 committed by Rafael J. Wysocki
parent da58445570
commit 5a1c022850
1 changed files with 4 additions and 0 deletions
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4
drivers/cpufreq/cpufreq.c
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@ -1476,6 +1476,10 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
pr_debug("target for CPU %u: %u kHz, relation %u\n", policy->cpu,
target_freq, relation);
if (target_freq == policy->cur)
return 0;
if (cpu_online(policy->cpu) && cpufreq_driver->target)
retval = cpufreq_driver->target(policy, target_freq, relation);