linux-kernel - Re: [PATCH v3 0/3] PM: add two devres helpers and use them in qcom cc

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Message-ID: <CAA8EJppSVotv-O=2h3BVqAC6f7xG+2BvUREesKs9v7RJkLORrQ@mail.gmail.com>
Date:   Fri, 6 Aug 2021 10:08:11 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Michael Turquette <mturquette@...libre.com>,
        Pavel Machek <pavel@....cz>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Taniya Das <tdas@...eaurora.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:COMMON CLK FRAMEWORK" <linux-clk@...r.kernel.org>,
        "open list:DRM DRIVER FOR MSM ADRENO GPU" 
        <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v3 0/3] PM: add two devres helpers and use them in qcom cc

On Fri, 6 Aug 2021 at 02:53, Stephen Boyd <sboyd@...nel.org> wrote:
>
> Quoting Dmitry Baryshkov (2021-07-31 12:50:31)
> > Most of the drivers using using pm_runtime_enable() or pm_clk_create()
> > follow the same pattern: call the function in the probe() path and call
> > correspondingly pm_runtime_disable() or pm_clk_destroy() from the
> > probe()'s error path and from the remove() function. This common code
> > pattern has several drawbacks. I.e. driver authors have to ensure that
> > the disable/destroy call in the error path really corresponds to the
> > proper error clause. Or that the disable/destroy call is not missed in
> > the remove() callback.
> >
> > Add two devres helpers replacing these code patterns with relevant devm
> > function call, removing the need to call corresponding disable/destroy
> > functions. As an example modify Qualcomm clock controller code to use
> > new helpers. In this case we are able to drop error path and remove
> > functions completely, simplifying the drivers in question.
>
> There are lots of folks on the To: line so I'm not sure who is supposed
> to apply this. Please indicate which maintainer tree you're planning to
> land a series through if it touches different areas of the tree.

I'd prefer for them to go through the clock tree.

-- 
With best wishes
Dmitry