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[176.245.131.134]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b842a56962esm305666066b.66.2026.01.06.11.36.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Jan 2026 11:36:30 -0800 (PST) From: Francesco Lavra To: Ramona Gradinariu , Antoniu Miclaus , Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , David Lechner , =?UTF-8?q?Nuno=20S=C3=A1?= , Andy Shevchenko , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] iio: accel: adxl380: Avoid reading more entries than present in FIFO Date: Tue, 6 Jan 2026 20:36:26 +0100 Message-Id: <20260106193627.3989930-2-flavra@baylibre.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260106193627.3989930-1-flavra@baylibre.com> References: <20260106193627.3989930-1-flavra@baylibre.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1303; i=flavra@baylibre.com; h=from:subject; bh=WaRLC/LKB8KfQ8m6QmS1keARdD2yuloMro4ENkodzwI=; b=owEB7QES/pANAwAKAe3xO3POlDZfAcsmYgBpXWPR2hQ3ON2IvPxHXv6h78kYLyQPz2AuvKbM+ x9+Rhi/CVaJAbMEAAEKAB0WIQSGV4VPlTvcox7DFObt8TtzzpQ2XwUCaV1j0QAKCRDt8TtzzpQ2 XzK+C/4uJuTc7ynmXkN/n+yWO4184teeKdM8kPe//wSUfqaqsl/JcxuVV89hTO9+YwUoDCmitk6 ABIxy4laLeKzZDmS/1iZHWllLh6rjRXelfuoW6rY3n6BK413id5Zi33EFTWBYB1PwWImlRaupql BnZa6o/V475sBUtIR+ClDIdL+SEgtXrHvAWgxUQzBjbA8m6q7kUYpsz9lktLDX6i39y9LYgD0HJ wxrGA4AnrRxls5tfSAorM//EJNPo42nevMBTF4YiS+4qnwwNHZIfU90cry6mc3P3HpXdQiAhpZ7 Wk6Z6A3CFwNZydPtUUEwl9FQ7wh7BNxOpZxtLSPZnG5plN0qFb0uQFZgCLNdzT6V51sc0A5qavy uGltoPvZMiuX5fLsVy5LymGE22L+812DgdQmO1tHIHJiEnb/fVRLEzGJDAh/ix3kZdq1NzLMaKs z0/pl9gEXGx2jhSj4SieYn5JcqdFitfU8HQJu97WrDvtweZ92KAbltme8eI0Wze9aTlsc= X-Developer-Key: i=flavra@baylibre.com; a=openpgp; fpr=8657854F953BDCA31EC314E6EDF13B73CE94365F Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The interrupt handler reads FIFO entries in batches of N samples, where N is the number of scan elements that have been enabled. However, the sensor fills the FIFO one sample at a time, even when more than one channel is enabled. Therefore,the number of entries reported by the FIFO status registers may not be a multiple of N; if this number is not a multiple, the number of entries read from the FIFO may exceed the number of entries actually present. To fix the above issue, round down the number of FIFO entries read from the status registers so that it is always a multiple of N. Fixes: df36de13677a ("iio: accel: add ADXL380 driver") Signed-off-by: Francesco Lavra --- drivers/iio/accel/adxl380.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/iio/accel/adxl380.c b/drivers/iio/accel/adxl380.c index aef5109c1ddd..9f6c0e02575a 100644 --- a/drivers/iio/accel/adxl380.c +++ b/drivers/iio/accel/adxl380.c @@ -949,6 +949,7 @@ static irqreturn_t adxl380_irq_handler(int irq, void *= p) if (ret) return IRQ_HANDLED; =20 + fifo_entries =3D rounddown(fifo_entries, st->fifo_set_size); for (i =3D 0; i < fifo_entries; i +=3D st->fifo_set_size) { ret =3D regmap_noinc_read(st->regmap, ADXL380_FIFO_DATA, &st->fifo_buf[i], --=20 2.39.5