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path: root/drivers/cpufreq/cpufreq.c
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Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
-rw-r--r--drivers/cpufreq/cpufreq.c29
1 files changed, 18 insertions, 11 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index b87596b591b3..c4acfc5273b3 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1491,6 +1491,9 @@ static unsigned int cpufreq_update_current_freq(struct cpufreq_policy *policy)
{
unsigned int new_freq;
+ if (cpufreq_suspended)
+ return 0;
+
new_freq = cpufreq_driver->get(policy->cpu);
if (!new_freq)
return 0;
@@ -1554,21 +1557,25 @@ void cpufreq_suspend(void)
if (!cpufreq_driver)
return;
- if (!has_target())
+ if (!has_target() && !cpufreq_driver->suspend)
goto suspend;
pr_debug("%s: Suspending Governors\n", __func__);
for_each_active_policy(policy) {
- down_write(&policy->rwsem);
- ret = cpufreq_governor(policy, CPUFREQ_GOV_STOP);
- up_write(&policy->rwsem);
+ if (has_target()) {
+ down_write(&policy->rwsem);
+ ret = cpufreq_governor(policy, CPUFREQ_GOV_STOP);
+ up_write(&policy->rwsem);
- if (ret)
- pr_err("%s: Failed to stop governor for policy: %p\n",
- __func__, policy);
- else if (cpufreq_driver->suspend
- && cpufreq_driver->suspend(policy))
+ if (ret) {
+ pr_err("%s: Failed to stop governor for policy: %p\n",
+ __func__, policy);
+ continue;
+ }
+ }
+
+ if (cpufreq_driver->suspend && cpufreq_driver->suspend(policy))
pr_err("%s: Failed to suspend driver: %p\n", __func__,
policy);
}
@@ -1593,7 +1600,7 @@ void cpufreq_resume(void)
cpufreq_suspended = false;
- if (!has_target())
+ if (!has_target() && !cpufreq_driver->resume)
return;
pr_debug("%s: Resuming Governors\n", __func__);
@@ -1602,7 +1609,7 @@ void cpufreq_resume(void)
if (cpufreq_driver->resume && cpufreq_driver->resume(policy)) {
pr_err("%s: Failed to resume driver: %p\n", __func__,
policy);
- } else {
+ } else if (has_target()) {
down_write(&policy->rwsem);
ret = cpufreq_start_governor(policy);
up_write(&policy->rwsem);