linux-kernel - Re: [PATCH v5 1/5] arch_topology: validate input frequencies to arch_set_freq

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Message-ID: <20200902133200.GH25462@bogus>
Date:   Wed, 2 Sep 2020 14:32:00 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Ionela Voinescu <ionela.voinescu@....com>
Cc:     rjw@...ysocki.net, viresh.kumar@...aro.org,
        dietmar.eggemann@....com, catalin.marinas@....com, will@...nel.org,
        valentin.schneider@....com, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 1/5] arch_topology: validate input frequencies to
 arch_set_freq_scale()

On Tue, Sep 01, 2020 at 09:55:45PM +0100, Ionela Voinescu wrote:
> The current frequency passed to arch_set_freq_scale() could end up
> being 0, signaling an error in setting a new frequency. Also, if the
> maximum frequency in 0, this will result in a division by 0 error.
>
> Therefore, validate these input values before using them for the
> setting of the frequency scale factor.
>
> Signed-off-by: Ionela Voinescu <ionela.voinescu@....com>
> Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
> Cc: Sudeep Holla <sudeep.holla@....com>

Reviewed-by: Sudeep Holla <sudeep.holla@....com>

--
Regards,
Sudeep