linux-kernel - Re: [PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for struct device

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Message-ID: <CAHp75VcSFr+E7_woyw6jx7e9wCeFUUouV_7xJXYO26_y6=fwTQ@mail.gmail.com>
Date:   Thu, 2 Jun 2022 15:45:27 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Lars-Peter Clausen <lars@...afoo.de>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        linux-iio <linux-iio@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        linux-amlogic <linux-amlogic@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>
Subject: Re: [PATCH v2 3/3] iio: adc: meson_saradc: Use temporary variable for
 struct device

On Thu, Jun 2, 2022 at 2:08 PM Lars-Peter Clausen <lars@...afoo.de> wrote:
> On 6/2/22 13:42, Andy Shevchenko wrote:

...

> > -     priv->adc_clk = devm_clk_register(&indio_dev->dev, &priv->clk_gate.hw);
> > +     priv->adc_clk = devm_clk_register(idev, &priv->clk_gate.hw);
>
> You are not changing anything here.

The scope of patch is supposed not to change the current behaviour :-)

> But we shouldn't be devm'ing on the
> IIO device. It will get freed eventually, but only when the last
> reference to the iio device has been dropped, which might be long after
> the platform device has been removed. devm'ing should happen on the
> platform_device's device. Might be worth fixing.

Thanks for confirming my suspicions (as I mentioned to Martin, using
an IIO device there feels wrong).
I will add another patch to v3.

-- 
With Best Regards,
Andy Shevchenko