[PATCH] cpufreq: Avoid calling cpufreq driver's target() routine if target_freq == policy->cur
Viresh Kumar
viresh.kumar at linaro.org
Fri Oct 26 05:36:26 EDT 2012
Avoid calling cpufreq driver's target() routine if new frequency is same as
policies current frequency.
Signed-off-by: Viresh Kumar <viresh.kumar at linaro.org>
---
drivers/cpufreq/cpufreq.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 261ef65..28dc134 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -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);
--
1.7.12.rc2.18.g61b472e
More information about the linux-arm-kernel
mailing list