iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cpufreq: governor: Check transition latecy at init time only

Browse Source 
It is not necessary to check the governor's max_transition_latency
attribute every time cpufreq_governor() runs, so check it only if
the event argument is CPUFREQ_GOV_POLICY_INIT.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Rafael J. Wysocki 2016-05-14 01:00:28 +02:00
parent d6ff44d647
commit 9e8c0a899b
1 changed files with 13 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/cpufreq/cpufreq.c
View File

@ -2011,6 +2011,7 @@ static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
if (!policy->governor)
return -EINVAL;
if (event == CPUFREQ_GOV_POLICY_INIT) {
if (policy->governor->max_transition_latency &&
policy->cpuinfo.transition_latency >
policy->governor->max_transition_latency) {
@ -2025,9 +2026,9 @@ static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
}
}
if (event == CPUFREQ_GOV_POLICY_INIT)
if (!try_module_get(policy->governor->owner))
return -EINVAL;
}
pr_debug("%s: for CPU %u, event %u\n", __func__, policy->cpu, event);