linux-kernel - Re: [PATCH] gpio: gpio-stmpe: fully use convert probe to device-managed

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Date:   Fri, 21 May 2021 14:42:15 +0200
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Alexandru Ardelean <aardelean@...iqon.com>
Cc:     linux-gpio <linux-gpio@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        alexandre.torgue@...s.st.com,
        Maxime Coquelin <mcoquelin.stm32@...il.com>
Subject: Re: [PATCH] gpio: gpio-stmpe: fully use convert probe to device-managed

On Sun, May 16, 2021 at 8:14 AM Alexandru Ardelean
<aardelean@...iqon.com> wrote:
>
> The driver doesn't look like it can be built as a kmod, so leaks cannot
> happen via a rmmod mechanism.
> The remove hook was removed via commit 3b52bb960ec6 ("gpio: stmpe: make
> it explicitly non-modular").
>
> The IRQ is registered via devm_request_threaded_irq(), making the driver
> only partially device-managed.
>
> In any case all resources should be made device-managed, mostly as a good
> practice. That way at least the unwinding on error is happening in reverse
> order (as the probe).
>
> This change also removes platform_set_drvdata() since the information is
> never retrieved to be used in the driver.
>
> Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>

I applied the patch and tweaked the commit message because as Andy
pointed out - this driver can be unbound over sysfs.

Bart