cpufreq: governor: Avoid passing dbs_data pointers around unnecessarily
Do not pass struct dbs_data pointers to the family of functions
implementing governor operations in cpufreq_governor.c as they can
take that pointer from policy->governor by themselves.
The cpufreq_governor_init() case is slightly more complicated, since
policy->governor may be NULL when it is invoked, but then it can reach
the pointer in question via its cdata argument just fine.
While at it, rework cpufreq_governor_dbs() to avoid a pointless
policy_governor check in the CPUFREQ_GOV_POLICY_INIT case.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index f291fdd..a329e1b 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -329,9 +329,9 @@
}
static int cpufreq_governor_init(struct cpufreq_policy *policy,
- struct dbs_data *dbs_data,
struct common_dbs_data *cdata)
{
+ struct dbs_data *dbs_data = cdata->gdbs_data;
unsigned int latency;
int ret;
@@ -403,9 +403,9 @@
return ret;
}
-static int cpufreq_governor_exit(struct cpufreq_policy *policy,
- struct dbs_data *dbs_data)
+static int cpufreq_governor_exit(struct cpufreq_policy *policy)
{
+ struct dbs_data *dbs_data = policy->governor_data;
struct common_dbs_data *cdata = dbs_data->cdata;
struct cpu_dbs_info *cdbs = cdata->get_cpu_cdbs(policy->cpu);
@@ -432,9 +432,9 @@
return 0;
}
-static int cpufreq_governor_start(struct cpufreq_policy *policy,
- struct dbs_data *dbs_data)
+static int cpufreq_governor_start(struct cpufreq_policy *policy)
{
+ struct dbs_data *dbs_data = policy->governor_data;
struct common_dbs_data *cdata = dbs_data->cdata;
unsigned int sampling_rate, ignore_nice, j, cpu = policy->cpu;
struct cpu_dbs_info *cdbs = cdata->get_cpu_cdbs(cpu);
@@ -499,9 +499,9 @@
return 0;
}
-static int cpufreq_governor_stop(struct cpufreq_policy *policy,
- struct dbs_data *dbs_data)
+static int cpufreq_governor_stop(struct cpufreq_policy *policy)
{
+ struct dbs_data *dbs_data = policy->governor_data;
struct cpu_dbs_info *cdbs = dbs_data->cdata->get_cpu_cdbs(policy->cpu);
struct cpu_common_dbs_info *shared = cdbs->shared;
@@ -515,9 +515,9 @@
return 0;
}
-static int cpufreq_governor_limits(struct cpufreq_policy *policy,
- struct dbs_data *dbs_data)
+static int cpufreq_governor_limits(struct cpufreq_policy *policy)
{
+ struct dbs_data *dbs_data = policy->governor_data;
struct common_dbs_data *cdata = dbs_data->cdata;
unsigned int cpu = policy->cpu;
struct cpu_dbs_info *cdbs = cdata->get_cpu_cdbs(cpu);
@@ -542,45 +542,31 @@
int cpufreq_governor_dbs(struct cpufreq_policy *policy,
struct common_dbs_data *cdata, unsigned int event)
{
- struct dbs_data *dbs_data;
- int ret;
+ int ret = -EINVAL;
/* Lock governor to block concurrent initialization of governor */
mutex_lock(&dbs_data_mutex);
- if (have_governor_per_policy())
- dbs_data = policy->governor_data;
- else
- dbs_data = cdata->gdbs_data;
-
- if (!dbs_data && (event != CPUFREQ_GOV_POLICY_INIT)) {
- ret = -EINVAL;
- goto unlock;
+ if (event == CPUFREQ_GOV_POLICY_INIT) {
+ ret = cpufreq_governor_init(policy, cdata);
+ } else if (policy->governor_data) {
+ switch (event) {
+ case CPUFREQ_GOV_POLICY_EXIT:
+ ret = cpufreq_governor_exit(policy);
+ break;
+ case CPUFREQ_GOV_START:
+ ret = cpufreq_governor_start(policy);
+ break;
+ case CPUFREQ_GOV_STOP:
+ ret = cpufreq_governor_stop(policy);
+ break;
+ case CPUFREQ_GOV_LIMITS:
+ ret = cpufreq_governor_limits(policy);
+ break;
+ }
}
- switch (event) {
- case CPUFREQ_GOV_POLICY_INIT:
- ret = cpufreq_governor_init(policy, dbs_data, cdata);
- break;
- case CPUFREQ_GOV_POLICY_EXIT:
- ret = cpufreq_governor_exit(policy, dbs_data);
- break;
- case CPUFREQ_GOV_START:
- ret = cpufreq_governor_start(policy, dbs_data);
- break;
- case CPUFREQ_GOV_STOP:
- ret = cpufreq_governor_stop(policy, dbs_data);
- break;
- case CPUFREQ_GOV_LIMITS:
- ret = cpufreq_governor_limits(policy, dbs_data);
- break;
- default:
- ret = -EINVAL;
- }
-
-unlock:
mutex_unlock(&dbs_data_mutex);
-
return ret;
}
EXPORT_SYMBOL_GPL(cpufreq_governor_dbs);