linux-kernel - Re: [PATCH v12 2/2] cpufreq: qcom-hw: Add support for QCOM cpufreq HW driver

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Message-ID: <20181213103608.vs255cq46fu4w2cc@vireshk-i7>
Date:   Thu, 13 Dec 2018 16:06:08 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Taniya Das <tdas@...eaurora.org>, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, Rajendra Nayak <rnayak@...eaurora.org>,
        devicetree@...r.kernel.org, robh@...nel.org,
        skannan@...eaurora.org, linux-arm-msm@...r.kernel.org,
        evgreen@...gle.com, Matthias Kaehlcke <mka@...omium.org>
Subject: Re: [PATCH v12 2/2] cpufreq: qcom-hw: Add support for QCOM cpufreq
 HW driver

On 13-12-18, 02:32, Stephen Boyd wrote:
> I have one policy for four CPUs. So take down all four of those CPUs by
> writing a 0 to the online file for each CPU, and then bring them back
> online. That should make cpufreq_driver->init() be called twice, once
> during boot when the CPUs are bound to the cpufreq devices, and second
> from the sysfs write when the user brings the first CPU in that policy
> online again by writing a 1 to the online file. If that second time it
> fails I suspect we hit the lockdep warning.

Okay, that is a special sequence. I will try to reproduce that
locally. Thanks.

-- 
viresh