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cpufreq: ACPI: Don't validate the frequency table twice

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The cpufreq core is already validating the CPU frequency table after
calling the ->init() callback of the cpufreq drivers and the drivers
don't need to do the same anymore. Though they need to set the
policy->freq_table field directly from the ->init() callback now.

Stop validating the frequency table in the acpi-cpufreq driver.

The driver needs to crosscheck if the max frequency corresponds to the
P-state 0 or not and the same is done from the ->ready() callback now.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2018-02-26 10:38:46 +05:30 committed by Rafael J. Wysocki
parent 92c99d159c
commit 1a186d9e11
1 changed files with 11 additions and 9 deletions
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20
drivers/cpufreq/acpi-cpufreq.c
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@ -794,15 +794,9 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
valid_states++;
}
freq_table[valid_states].frequency = CPUFREQ_TABLE_END;
policy->freq_table = freq_table;
perf->state = 0;
result = cpufreq_table_validate_and_show(policy, freq_table);
if (result)
goto err_freqfree;
if (perf->states[0].core_frequency * 1000 != policy->cpuinfo.max_freq)
pr_warn(FW_WARN "P-state 0 is not max freq\n");
switch (perf->control_register.space_id) {
case ACPI_ADR_SPACE_SYSTEM_IO:
/*
@ -842,8 +836,6 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
return result;
err_freqfree:
kfree(freq_table);
err_unreg:
acpi_processor_unregister_performance(cpu);
err_free_mask:
@ -871,6 +863,15 @@ static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy)
return 0;
}
static void acpi_cpufreq_cpu_ready(struct cpufreq_policy *policy)
{
struct acpi_processor_performance *perf = per_cpu_ptr(acpi_perf_data,
policy->cpu);
if (perf->states[0].core_frequency * 1000 != policy->cpuinfo.max_freq)
pr_warn(FW_WARN "P-state 0 is not max freq\n");
}
static int acpi_cpufreq_resume(struct cpufreq_policy *policy)
{
struct acpi_cpufreq_data *data = policy->driver_data;
@ -898,6 +899,7 @@ static struct cpufreq_driver acpi_cpufreq_driver = {
.bios_limit = acpi_processor_get_bios_limit,
.init = acpi_cpufreq_cpu_init,
.exit = acpi_cpufreq_cpu_exit,
.ready = acpi_cpufreq_cpu_ready,
.resume = acpi_cpufreq_resume,
.name = "acpi-cpufreq",
.attr = acpi_cpufreq_attr,