linux-kernel - Re: [PATCH v2 01/14] opp: Add devres wrapper for dev_pm_opp_set

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Date:   Fri, 12 Mar 2021 16:19:14 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Qiang Yu <yuq825@...il.com>, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>, Rob Herring <robh@...nel.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Steven Price <steven.price@....com>,
        Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Lukasz Luba <lukasz.luba@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Yangtao Li <tiny.windzz@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        lima@...ts.freedesktop.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
        linux-mmc <linux-mmc@...r.kernel.org>, linux-spi@...r.kernel.org,
        linux-serial@...r.kernel.org,
        linux-tegra <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH v2 01/14] opp: Add devres wrapper for
 dev_pm_opp_set_clkname

12.03.2021 13:36, Ulf Hansson пишет:
> On Fri, 12 Mar 2021 at 06:33, Viresh Kumar <viresh.kumar@...aro.org> wrote:
>>
>> On 11-03-21, 22:20, Dmitry Osipenko wrote:
>>> +struct opp_table *devm_pm_opp_set_clkname(struct device *dev, const char *name)
>>> +{
>>> +     struct opp_table *opp_table;
>>> +     int err;
>>> +
>>> +     opp_table = dev_pm_opp_set_clkname(dev, name);
>>> +     if (IS_ERR(opp_table))
>>> +             return opp_table;
>>> +
>>> +     err = devm_add_action_or_reset(dev, devm_pm_opp_clkname_release, opp_table);
>>> +     if (err)
>>> +             opp_table = ERR_PTR(err);
>>> +
>>> +     return opp_table;
>>> +}
>>
>> I wonder if we still need to return opp_table from here, or a simple
>> integer is fine.. The callers shouldn't be required to use the OPP
>> table directly anymore I believe and so better simplify the return
>> part of this and all other routines you are adding here..
> 
> Yes, please. I was thinking along the same lines, when I reviewed the
> mmc patch (patch9).
> 
>>
>> If there is a user which needs the opp_table, let it use the regular
>> non-devm variant.

Indeed, that's a very good suggestion! The opp_table isn't needed by the
devm users, I'll change it in v3, thanks!