When _PPC changed dynamically the user_policy.max will not be updated,
this prevent CPU run on the highest frequency.
Signed-off-by: Joe Jin <joe....@oracle.com>
Cc: Rafael J. Wysocki <r...@sisk.pl>
Cc: Viresh Kumar <viresh.ku...@linaro.org>
---
drivers/acpi/processor_perflib.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index e854582..e01aa7d 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -180,6 +180,7 @@ static void acpi_processor_ppc_ost(acpi_handle handle, int
status)
int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag)
{
int ret;
+ unsigned int saved = (unsigned int)pr->performance_platform_limit;
if (ignore_ppc) {
/*
@@ -204,8 +205,22 @@ int acpi_processor_ppc_has_changed(struct acpi_processor
*pr, int event_flag)
}
if (ret < 0)
return (ret);
- else
+ else {
+ unsigned int ppc = (unsigned int)pr->performance_platform_limit;
+
+ if (saved != ppc) {
+ struct cpufreq_policy *policy;
+
+ policy = cpufreq_cpu_get(pr->id);
+ if (likely(policy))
+ policy->user_policy.max =
+ pr->performance->states[ppc].
+ core_frequency * 1000;
+ cpufreq_cpu_put(policy);
+ }
+
return cpufreq_update_policy(pr->id);
+ }
}
int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
--
1.8.1.4
--
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