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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-05-12 15:13:35 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-05-18 02:27:32 +0200 |
| commit | 36be3418eb769c66bc16eb1c9b402591cf1219b7 (patch) | |
| tree | f4ce2eab966b71b5644f79306e135cd9c52ff634 /drivers/cpufreq | |
| parent | intel_pstate: Simplify conditional in intel_pstate_set_policy() (diff) | |
| download | linux-36be3418eb769c66bc16eb1c9b402591cf1219b7.tar.xz linux-36be3418eb769c66bc16eb1c9b402591cf1219b7.zip | |
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')
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 35 |
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 */ |