linux-kernel - Re: [PATCH 1/2] spi: spidev: fix a race condition when accessing spidev->spi

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Message-ID: <Y7bWCm/hpK4pbI6W@sirena.org.uk>
Date:   Thu, 5 Jan 2023 13:52:10 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH 1/2] spi: spidev: fix a race condition when accessing
 spidev->spi

On Thu, Jan 05, 2023 at 01:40:59PM +0100, Bartosz Golaszewski wrote:

> can replace the spinlock with a sleeping lock. Using an RW semaphore
> allows the syscalls to run concurrently unless protected otherwise. We

I'm not sure this is important or useful, there's not a lot that can
practically happen concurrently when we get to actually interacting with
the device and it's making the code a bit less clear.

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