From: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Date: Fri, 8 Dec 2017 17:41:47 +0000 (+0100)
Subject: iio: adc: ina2xx: Clarify size requirement for data buffer
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=d456d61f53ece55ae17599bf004bb071c0a618e4;p=openwrt%2Fstaging%2Fblogic.git

iio: adc: ina2xx: Clarify size requirement for data buffer

The timestamp is inserted into the buffer after the sample data by
iio_push_to_buffers_with_timestamp, document the space requirement for
the timestamp.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
index 3195f8754c3b..8c8120406f52 100644
--- a/drivers/iio/adc/ina2xx-adc.c
+++ b/drivers/iio/adc/ina2xx-adc.c
@@ -700,7 +700,8 @@ static const struct iio_chan_spec ina219_channels[] = {
 static int ina2xx_work_buffer(struct iio_dev *indio_dev)
 {
 	struct ina2xx_chip_info *chip = iio_priv(indio_dev);
-	unsigned short data[8];
+	/* data buffer needs space for channel data and timestap */
+	unsigned short data[4 + sizeof(s64)/sizeof(short)];
 	int bit, ret, i = 0;
 	s64 time_a, time_b;
 	unsigned int alert;