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Date: Sun, 27 Sep 2026 20:19:48 +0100
From: Jonathan Cameron <jic23@kernel.org>
To: Rupesh Majhi <zoone.rupert@gmail.com>
Cc: Andy Shevchenko <andy@kernel.org>, Bill Wendling <morbo@google.com>,
 David Lechner <dlechner@baylibre.com>, Eddie James <eajames@linux.ibm.com>,
 Joel Stanley <joel@jms.id.au>, Justin Stitt <justinstitt@google.com>,
 Nathan Chancellor <nathan@kernel.org>, Nick Desaulniers
 <ndesaulniers@google.com>, Nuno =?UTF-8?B?U8Oh?= <nuno.sa@analog.com>,
 linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
 llvm@lists.linux.dev
Subject: Re: [PATCH v8 04/10] iio: pressure: dps310: take the lock once per
 raw read
Message-ID: <20260927201917.2e8412b7@jic23-hlaptop>
In-Reply-To: <20260921183132.233136-5-zoone.rupert@gmail.com>
References: <20260921183132.233136-1-zoone.rupert@gmail.com>
	<20260921183132.233136-5-zoone.rupert@gmail.com>
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On Mon, 21 Sep 2026 21:31:26 +0300
Rupesh Majhi <zoone.rupert@gmail.com> wrote:

> A processed pressure read takes the lock twice: once in the raw read,
> then again when dps310_calculate_pressure() trylocks to refresh the
> temperature. The refresh is skipped whenever the lock is busy.
> 
> Split the raw reads into variants that expect the lock held and give each
> channel a helper that takes it once for the whole sequence, so the
> temperature refresh is unconditional. Buffered capture later in this
> series needs the same shape.
> 
> Mark the functions that need the lock with __must_hold() rather than a
> comment, and include cleanup.h, which ACQUIRE() needs and was coming in
> transitively.
> 
> Assisted-by: LLM
> Signed-off-by: Rupesh Majhi <zoone.rupert@gmail.com>
Applied.