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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-05-12 16:13:35 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-05-18 03:27:32 +0300
commit36be3418eb769c66bc16eb1c9b402591cf1219b7 (patch)
treef4ce2eab966b71b5644f79306e135cd9c52ff634 /drivers/cpufreq/cpufreq.c
parentc749c64f45fa07d20e11af2e3f3caa9d7650d341 (diff)
downloadlinux-36be3418eb769c66bc16eb1c9b402591cf1219b7.tar.xz
cpufreq: governor: CPUFREQ_GOV_POLICY_EXIT never fails
None of the cpufreq governors currently in the tree will ever fail an invocation of the ->governor() callback with the event argument equal to CPUFREQ_GOV_POLICY_EXIT (unless invoked with incorrect arguments which doesn't matter anyway) and it wouldn't really make sense to fail it, because the caller won't be able to handle that failure in a meaningful way. Accordingly, rearrange the code in the core to make it clear that this call never fails. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
-rw-r--r--drivers/cpufreq/cpufreq.c35
1 files changed, 12 insertions, 23 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 035513b012ee..74ab6f79145b 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -78,9 +78,9 @@ static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event);
static unsigned int __cpufreq_get(struct cpufreq_policy *policy);
static int cpufreq_start_governor(struct cpufreq_policy *policy);
-static inline int cpufreq_exit_governor(struct cpufreq_policy *policy)
+static inline void cpufreq_exit_governor(struct cpufreq_policy *policy)
{
- return cpufreq_governor(policy, CPUFREQ_GOV_POLICY_EXIT);
+ (void)cpufreq_governor(policy, CPUFREQ_GOV_POLICY_EXIT);
}
/**
@@ -1387,12 +1387,8 @@ static void cpufreq_offline(unsigned int cpu)
if (cpufreq_driver->stop_cpu)
cpufreq_driver->stop_cpu(policy);
- /* If cpu is last user of policy, free policy */
- if (has_target()) {
- ret = cpufreq_exit_governor(policy);
- if (ret)
- pr_err("%s: Failed to exit governor\n", __func__);
- }
+ if (has_target())
+ cpufreq_exit_governor(policy);
/*
* Perform the ->exit() even during light-weight tear-down,
@@ -2049,16 +2045,15 @@ static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
ret = policy->governor->governor(policy, event);
- if (!ret) {
- if (event == CPUFREQ_GOV_POLICY_INIT)
+ if (event == CPUFREQ_GOV_POLICY_INIT) {
+ if (ret)
+ module_put(policy->governor->owner);
+ else
policy->governor->initialized++;
- else if (event == CPUFREQ_GOV_POLICY_EXIT)
- policy->governor->initialized--;
- }
-
- if (((event == CPUFREQ_GOV_POLICY_INIT) && ret) ||
- ((event == CPUFREQ_GOV_POLICY_EXIT) && !ret))
+ } else if (event == CPUFREQ_GOV_POLICY_EXIT) {
+ policy->governor->initialized--;
module_put(policy->governor->owner);
+ }
return ret;
}
@@ -2228,13 +2223,7 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
__func__, old_gov->name, ret);
return ret;
}
-
- ret = cpufreq_exit_governor(policy);
- if (ret) {
- pr_err("%s: Failed to Exit Governor: %s (%d)\n",
- __func__, old_gov->name, ret);
- return ret;
- }
+ cpufreq_exit_governor(policy);
}
/* start new governor */