linux-kernel - Re: [PATCH v2] iio: trigger: Avoid data race

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Message-ID: <CAKbEznv+GCBOaWxkgcufJrX4knYT=JKQC3iekowFThs7b7CuXw@mail.gmail.com>
Date: Wed, 28 May 2025 22:27:25 +0900
From: Gyeyoung Baek <gye976@...il.com>
To: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: Jonathan Cameron <jic23@...nel.org>, David Lechner <dlechner@...libre.com>, 
	Nuno Sá <nuno.sa@...log.com>, 
	Andy Shevchenko <andy@...nel.org>, linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] iio: trigger: Avoid data race

On Wed, May 28, 2025 at 6:22 PM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
>
> On Wed, May 28, 2025 at 10:01 AM Gyeyoung Baek <gye976@...il.com> wrote:
> >
> > A data race could occur between `atomic_read()` and `atomic_set()`.
> > Use `atomic_cmpxchg_relaxed()` to group them atomically.
> >
> > Previously the main logic was executed when `use_count` was 0.
> > Now it returns early when `use_count` was not 0.
>
> This needs Fixes tag, otherwise LGTM,
> Reviewed-by: Andy Shevchenko <andy@...nel.org>

Yes, then I'll send v3, thanks!

> --
> With Best Regards,
> Andy Shevchenko