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authorViresh Kumar <viresh.kumar@linaro.org>2012-10-31 04:28:15 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-11-15 03:33:09 +0400
commit5a1c022850ea5d64c2997bf9b89f5ae112d5ee4d (patch)
treea6ee4f063d362d456fe3e8c8475bf441aa51dfd8 /drivers/cpufreq
parentda58445570326ac2a342770a9c9a2646276e1721 (diff)
downloadlinux-5a1c022850ea5d64c2997bf9b89f5ae112d5ee4d.tar.xz
cpufreq: Avoid calling cpufreq driver's target() routine if target_freq == policy->cur
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>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/cpufreq.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 261ef654a352..28dc134cec36 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);