linux-kernel - Re: [PATCH v2 5/6] gpiolib: switch the line state notifier to atomic

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Message-ID: <20241014092450.GA101913@rigel>
Date: Mon, 14 Oct 2024 17:24:50 +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,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v2 5/6] gpiolib: switch the line state notifier to atomic

On Mon, Oct 14, 2024 at 09:48:16AM +0200, Bartosz Golaszewski wrote:
> On Mon, Oct 14, 2024 at 4:11 AM Kent Gibson <warthog618@...il.com> wrote:
> > >
> > > +     /*
> > > +      * This is called from atomic context (with a spinlock taken by the
> > > +      * atomic notifier chain). Any sleeping calls must be done outside of
> > > +      * this function in process context of the dedicated workqueue.
> > > +      *
> > > +      * Let's gather as much info as possible from the descriptor and
> > > +      * postpone just the call to pinctrl_gpio_can_use_line() until the work
> > > +      * is executed.
> > > +      */
> > > +
> >
> > Should be in patch 4?  You aren't otherwise changing that function here.
> >
>
> Until this patch, the comment isn't really true, so I figured it makes
> more sense here.
>

So the validity of the comment depends on how the function is being called?
Then perhaps you should reword it as well.

Cheers,
Kent.