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acpi-cpufreq: skip loading acpi_cpufreq after intel_pstate

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If the hw supports intel_pstate and acpi_cpufreq, intel_pstate will
get loaded first.

acpi_cpufreq_init() will call acpi_cpufreq_early_init()
and that will allocate perf data and init those perf data in ACPI core,
(that will cover all CPUs). But later it will free them as
cpufreq_register_driver(acpi_cpufreq) will fail as intel_pstate is
already registered

Use cpufreq_get_current_driver() to check if we can skip the
acpi_cpufreq loading.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Yinghai Lu 2013-09-20 10:43:56 -07:00 committed by Rafael J. Wysocki
parent 4a10c2ac2f
commit 8a61e12e84
1 changed files with 4 additions and 0 deletions
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4
drivers/cpufreq/acpi-cpufreq.c
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@ -986,6 +986,10 @@ static int __init acpi_cpufreq_init(void)
{
int ret;
/* don't keep reloading if cpufreq_driver exists */
if (cpufreq_get_current_driver())
return 0;
if (acpi_disabled)
return 0;