linux-kernel - Re: [PATCH 1/6] cpufreq: Retrieve current frequency from scaling drivers with internal governors

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Date:	Sat, 2 Feb 2013 08:18:47 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	dirk.brandewie@...il.com
Cc:	linux-kernel@...r.kernel.org, cpufreq@...r.kernel.org,
	Dirk Brandewie <dirk.j.brandewie@...el.com>
Subject: Re: [PATCH 1/6] cpufreq: Retrieve current frequency from scaling
 drivers with internal governors

On Sat, Feb 2, 2013 at 12:19 AM,  <dirk.brandewie@...il.com> wrote:
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c

> @@ -1219,6 +1219,9 @@ unsigned int cpufreq_quick_get(unsigned int cpu)
>         struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
>         unsigned int ret_freq = 0;
>
> +       if (cpufreq_driver && cpufreq_driver->setpolicy && cpufreq_driver->get)
> +               return cpufreq_driver->get(cpu);

You are required to do cpufreq_cpu_put() in this case too... Better do
cpufreq_cpu_get() after your check.

> +
>         if (policy) {
>                 ret_freq = policy->cur;
>                 cpufreq_cpu_put(policy);
> --
> 1.7.7.6
>
> --
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