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OpenCloudOS-Kernel
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Merge branches 'pm-domains' and 'pm-cpufreq' 

* pm-domains:
  PM / Domains: Fix bad of_node_put() in failure paths of genpd_dev_pm_attach()
  PM / Domains: Validate cases of a non-bound driver in genpd governor

* pm-cpufreq:
  cpufreq: use last policy after online for drivers with ->setpolicy
This commit is contained in:
Rafael J. Wysocki 2015-12-04 14:01:42 +01:00
parent 3e5050e60e 265e2cf672 69030dd1c3
commit d441fe25e7
4 changed files with 12 additions and 9 deletions
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3
drivers/base/power/domain.c
View File

@ -1775,10 +1775,10 @@ int genpd_dev_pm_attach(struct device *dev)
} }
pd = of_genpd_get_from_provider(&pd_args); pd = of_genpd_get_from_provider(&pd_args);
of_node_put(pd_args.np);
if (IS_ERR(pd)) { if (IS_ERR(pd)) {
dev_dbg(dev, "%s() failed to find PM domain: %ld\n", dev_dbg(dev, "%s() failed to find PM domain: %ld\n",
__func__, PTR_ERR(pd)); __func__, PTR_ERR(pd));
of_node_put(dev->of_node);
return -EPROBE_DEFER; return -EPROBE_DEFER;
} }
@ -1796,7 +1796,6 @@ int genpd_dev_pm_attach(struct device *dev)
if (ret < 0) { if (ret < 0) {
dev_err(dev, "failed to add to PM domain %s: %d", dev_err(dev, "failed to add to PM domain %s: %d",
pd->name, ret); pd->name, ret);
of_node_put(dev->of_node);
goto out; goto out;
} }

3
drivers/base/power/domain_governor.c
View File

@ -160,9 +160,6 @@ static bool default_power_down_ok(struct dev_pm_domain *pd)
struct gpd_timing_data *td; struct gpd_timing_data *td;
s64 constraint_ns; s64 constraint_ns;
if (!pdd->dev->driver)
continue;
/* /*
* Check if the device is allowed to be off long enough for the * Check if the device is allowed to be off long enough for the
* domain to turn off and on (that's how much time it will * domain to turn off and on (that's how much time it will

14
drivers/cpufreq/cpufreq.c
View File

@ -976,10 +976,14 @@ static int cpufreq_init_policy(struct cpufreq_policy *policy)
new_policy.governor = gov; new_policy.governor = gov;
/* Use the default policy if its valid. */ /* Use the default policy if there is no last_policy. */
if (cpufreq_driver->setpolicy) if (cpufreq_driver->setpolicy) {
cpufreq_parse_governor(gov->name, &new_policy.policy, NULL); if (policy->last_policy)
new_policy.policy = policy->last_policy;
else
cpufreq_parse_governor(gov->name, &new_policy.policy,
NULL);
}
/* set default policy */ /* set default policy */
return cpufreq_set_policy(policy, &new_policy); return cpufreq_set_policy(policy, &new_policy);
} }
@ -1330,6 +1334,8 @@ static void cpufreq_offline_prepare(unsigned int cpu)
if (has_target()) if (has_target())
strncpy(policy->last_governor, policy->governor->name, strncpy(policy->last_governor, policy->governor->name,
CPUFREQ_NAME_LEN); CPUFREQ_NAME_LEN);
else
policy->last_policy = policy->policy;
} else if (cpu == policy->cpu) { } else if (cpu == policy->cpu) {
/* Nominate new CPU */ /* Nominate new CPU */
policy->cpu = cpumask_any(policy->cpus); policy->cpu = cpumask_any(policy->cpus);

1
include/linux/cpufreq.h
View File

@ -77,6 +77,7 @@ struct cpufreq_policy {
unsigned int suspend_freq; /* freq to set during suspend */ unsigned int suspend_freq; /* freq to set during suspend */
unsigned int policy; /* see above */ unsigned int policy; /* see above */
unsigned int last_policy; /* policy before unplug */
struct cpufreq_governor *governor; /* see below */ struct cpufreq_governor *governor; /* see below */
void *governor_data; void *governor_data;
bool governor_enabled; /* governor start/stop flag */ bool governor_enabled; /* governor start/stop flag */