linux-kernel - [PATCH 5.3 060/112] iio: accel: adxl372: Fix push to buffers lost samples

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Message-Id: <20191016214900.370082714@linuxfoundation.org>
Date:   Wed, 16 Oct 2019 14:50:52 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Stefan Popa <stefan.popa@...log.com>,
        Stable@...r.kernel.org,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [PATCH 5.3 060/112] iio: accel: adxl372: Fix push to buffers lost samples

From: Stefan Popa <stefan.popa@...log.com>

commit 62df81b74393079debf04961c48cb22268fc5fab upstream.

One in two sample sets was lost by multiplying fifo_set_size with
sizeof(u16). Also, the double number of available samples were pushed to
the iio buffers.

Signed-off-by: Stefan Popa <stefan.popa@...log.com>
Fixes: f4f55ce38e5f ("iio:adxl372: Add FIFO and interrupts support")
Cc: <Stable@...r.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/iio/accel/adxl372.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/iio/accel/adxl372.c
+++ b/drivers/iio/accel/adxl372.c
@@ -553,8 +553,7 @@ static irqreturn_t adxl372_trigger_handl
 			goto err;
 
 		/* Each sample is 2 bytes */
-		for (i = 0; i < fifo_entries * sizeof(u16);
-		     i += st->fifo_set_size * sizeof(u16))
+		for (i = 0; i < fifo_entries; i += st->fifo_set_size)
 			iio_push_to_buffers(indio_dev, &st->fifo_buf[i]);
 	}
 err: