[PATCH v4 5/9] iio: adc: meson_saradc: annotate the lock helpers

From: Rupesh Majhi <zoone.rupert@gmail.com>
To: "Alex Lanzano" <lanzano.alex@gmail.com>,
	"Andy Shevchenko" <andy@kernel.org>,
	"Benson Leung" <bleung@chromium.org>,
	"David Lechner" <dlechner@baylibre.com>,
	"Guenter Roeck" <groeck@chromium.org>,
	"Jagath Jog J" <jagathjog1996@gmail.com>,
	"Javier Carrasco" <javier.carrasco.cruz@gmail.com>,
	"Jean-Baptiste Maneyrol" <jean-baptiste.maneyrol@tdk.com>,
	"Jerome Brunet" <jbrunet@baylibre.com>,
	"Jinseob Kim" <kimjinseob88@gmail.com>,
	"Jonathan Cameron" <jic23@kernel.org>,
	"Kevin Hilman" <khilman@baylibre.com>,
	"Lorenzo Bianconi" <lorenzo@kernel.org>,
	"Martin Blumenstingl" <martin.blumenstingl@googlemail.com>,
	"Matti Vaittinen" <mazziesaccount@gmail.com>,
	"Neil Armstrong" <neil.armstrong@linaro.org>,
	"Nuno Sá" <nuno.sa@analog.com>,
	"Remi Buisson" <remi.buisson@tdk.com>
Cc: chrome-platform@lists.linux.dev,
	linux-amlogic@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	linux-arm-msm@vger.kernel.org, linux-iio@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Rupesh Majhi <zoone.rupert@gmail.com>,
	Marco Elver <elver@google.com>,
	Bart Van Assche <bvanassche@acm.org>
Subject: [PATCH v4 5/9] iio: adc: meson_saradc: annotate the lock helpers
Date: Tue, 27 Oct 2026 14:49:50 +0200	[thread overview]
Message-ID: <20261027124954.110697-6-zoone.rupert@gmail.com> (raw)
In-Reply-To: <20261027124954.110697-1-zoone.rupert@gmail.com>

meson_sar_adc_lock() returns 0 with priv->lock held, and
meson_sar_adc_unlock() releases it. Annotate both so context analysis
follows the lock into the callers. Only indio_dev is in scope in the
annotation, so the lock is reached through iio_priv().

Signed-off-by: Rupesh Majhi <zoone.rupert@gmail.com>
---
Cc: Marco Elver <elver@google.com>
Cc: Bart Van Assche <bvanassche@acm.org>

 drivers/iio/adc/meson_saradc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 2b003fd5afeb..3c1bc2274129 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -578,6 +578,7 @@ static void meson_sar_adc_stop_sample_engine(struct iio_dev *indio_dev)
 }
 
 static int meson_sar_adc_lock(struct iio_dev *indio_dev)
+	__cond_acquires(0, &((struct meson_sar_adc_priv *)iio_priv(indio_dev))->lock)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
 	int val, ret;
@@ -608,6 +609,7 @@ static int meson_sar_adc_lock(struct iio_dev *indio_dev)
 }
 
 static void meson_sar_adc_unlock(struct iio_dev *indio_dev)
+	__releases(&((struct meson_sar_adc_priv *)iio_priv(indio_dev))->lock)
 {
 	struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
 
-- 
2.43.0


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