linux-kernel - [RESEND PATCH] acpi-cpufreq: get the cur_freq from acpi_processor

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Message-ID: <53F589C3.4050504@huawei.com>
Date:	Thu, 21 Aug 2014 13:55:15 +0800
From:	Wang Weidong <wangweidong1@...wei.com>
To:	<rjw@...ysocki.net>, <viresh.kumar@...aro.org>
CC:	<linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org >> \"linux-kernel@...r.kernel.org\"" 
	<linux-kernel@...r.kernel.org>
Subject: [RESEND PATCH] acpi-cpufreq: get the cur_freq from acpi_processor_performance
 states

As the initialized freq_tables maybe different from the p-states
values, so the array index is different as well.

p-states value: [2400 2400 2000 ...], while the freq_tables:
[2400 2000 ... CPUFREQ_TABLE_END]. After setted the freqs 2000,
the perf->state is 3 while the freqs_table's index should be 2.
So when call the get_cur_freq_on_cpu, the freqs value we get
is 2400.

So, fix the problem with the correct tables.

Signed-off-by: Wang Weidong <wangweidong1@...wei.com>
---
 drivers/cpufreq/acpi-cpufreq.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index b0c18ed..ac93885 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -365,6 +365,7 @@ static u32 get_cur_val(const struct cpumask *mask)
 static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
 {
 	struct acpi_cpufreq_data *data = per_cpu(acfreq_data, cpu);
+	struct acpi_processor_performance *perf;
 	unsigned int freq;
 	unsigned int cached_freq;
 
@@ -375,7 +376,8 @@ static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
 		return 0;
 	}
 
-	cached_freq = data->freq_table[data->acpi_data->state].frequency;
+	perf = data->acpi_data;
+	cached_freq = perf->states[perf->state].core_frequency * 1000;
 	freq = extract_freq(get_cur_val(cpumask_of(cpu)), data);
 	if (freq != cached_freq) {
 		/*
-- 
1.7.12


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