From: Greg KH <gregkh@linuxfoundation.org>
To: Mohammad Amin Hosseini <moahmmad.hosseinii@gmail.com>
Cc: linux-iio@vger.kernel.org, linux-staging@lists.linux.dev,
linux-kernel@vger.kernel.org, jic23@kernel.org, lars@metafoo.de,
Michael.Hennerich@analog.com, dlechner@baylibre.com,
nuno.sa@analog.com, andy@kernel.org
Subject: Re: [PATCH] staging: iio: adc: ad7816: add mutex to serialize SPI/GPIO operations
Date: Mon, 1 Sep 2025 08:10:23 +0200 [thread overview]
Message-ID: <2025090150-backspace-undone-e11d@gregkh> (raw)
In-Reply-To: <20250831153741.8820-1-moahmmad.hosseinii@gmail.com>
On Sun, Aug 31, 2025 at 07:07:41PM +0330, Mohammad Amin Hosseini wrote:
> From: mohammad amin hosseini <moahmmad.hosseinii@gmail.com>
>
> The ad7816 driver was accessing SPI and GPIO lines without
> synchronization, which could lead to race conditions when accessed
> concurrently from multiple contexts. This might result in corrupted
> readings or inconsistent GPIO states.
>
> Introduce an io_lock mutex in the driver structure to serialize:
> - SPI transactions in ad7816_spi_read() and ad7816_spi_write()
> - GPIO pin toggling sequences
> - Updates to device state via sysfs store functions (mode, channel, oti)
>
> The mutex ensures proper mutual exclusion and prevents race
> conditions under concurrent access.
>
> Signed-off-by: Mohammad Amin Hosseini <moahmmad.hosseinii@gmail.com>
Doesn't match the From: line exactly :(
next prev parent reply other threads:[~2025-09-01 6:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-31 15:37 [PATCH] staging: iio: adc: ad7816: add mutex to serialize SPI/GPIO operations Mohammad Amin Hosseini
2025-09-01 6:10 ` Greg KH [this message]
2025-09-01 16:47 ` David Lechner
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