linux-kernel - Re: [PATCH 2/7] cpufreq: Retrieve current frequency from scaling drivers with internal governors

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 6 Feb 2013 07:15:47 +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 2/7] cpufreq: Retrieve current frequency from scaling
 drivers with internal governors

On Tue, Feb 5, 2013 at 11:54 PM,  <dirk.brandewie@...il.com> wrote:
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> index 2817c3c..96bc302 100644
> --- a/drivers/cpufreq/cpufreq.c
> +++ b/drivers/cpufreq/cpufreq.c
> @@ -1181,6 +1181,13 @@ 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) {
> +               ret_freq = cpufreq_driver->get(cpu);
> +               cpufreq_cpu_put(policy);
> +               return ret_freq;
> +       }
> +

This was my comment on the last version:

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

It still applies.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/