linux-kernel - [PATCH 4.4 021/188] iio: ltr501: ltr501_read_ps(): add missing endianness conversion

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Date:   Mon, 19 Jul 2021 16:50:05 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Oliver Lang <Oliver.Lang@...senmetrawatt.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>, Stable@...r.kernel.org,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Nikita Travkin <nikita@...n.ru>
Subject: [PATCH 4.4 021/188] iio: ltr501: ltr501_read_ps(): add missing endianness conversion

From: Oliver Lang <Oliver.Lang@...senmetrawatt.com>

commit 71b33f6f93ef9462c84560e2236ed22209d26a58 upstream.

The PS ADC Channel data is spread over 2 registers in little-endian
form. This patch adds the missing endianness conversion.

Fixes: 2690be905123 ("iio: Add Lite-On ltr501 ambient light / proximity sensor driver")
Signed-off-by: Oliver Lang <Oliver.Lang@...senmetrawatt.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Tested-by: Nikita Travkin <nikita@...n.ru> # ltr559
Link: https://lore.kernel.org/r/20210610134619.2101372-4-mkl@pengutronix.de
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/light/ltr501.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/drivers/iio/light/ltr501.c
+++ b/drivers/iio/light/ltr501.c
@@ -411,18 +411,19 @@ static int ltr501_read_als(struct ltr501
 
 static int ltr501_read_ps(struct ltr501_data *data)
 {
-	int ret, status;
+	__le16 status;
+	int ret;
 
 	ret = ltr501_drdy(data, LTR501_STATUS_PS_RDY);
 	if (ret < 0)
 		return ret;
 
 	ret = regmap_bulk_read(data->regmap, LTR501_PS_DATA,
-			       &status, 2);
+			       &status, sizeof(status));
 	if (ret < 0)
 		return ret;
 
-	return status;
+	return le16_to_cpu(status);
 }
 
 static int ltr501_read_intr_prst(struct ltr501_data *data,