linux-kernel - Re: [PATCH v3] gpio: cdev: sanitize the label before requesting the interrupt

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Message-ID: <20240325092552.GA75236@rigel>
Date: Mon, 25 Mar 2024 17:25:52 +0800
From: Kent Gibson <warthog618@...il.com>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Linus Walleij <linus.walleij@...aro.org>, linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org, Alexey Dobriyan <adobriyan@...il.com>,
	stable@...r.kernel.org, Stefan Wahren <wahrenst@....net>,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v3] gpio: cdev: sanitize the label before requesting the
 interrupt

On Mon, Mar 25, 2024 at 10:02:42AM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
>
> When an interrupt is requested, a procfs directory is created under
> "/proc/irq/<irqnum>/<label>" where <label> is the string passed to one of
> the request_irq() variants.
>
> What follows is that the string must not contain the "/" character or
> the procfs mkdir operation will fail. We don't have such constraints for
> GPIO consumer labels which are used verbatim as interrupt labels for
> GPIO irqs. We must therefore sanitize the consumer string before
> requesting the interrupt.
>
> Let's replace all "/" with ":".
>

Looks good to me.

Reviewed-by: Kent Gibson <warthog618@...il.com>