| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.3 032/180] iio: adc: ad7606: fix reading unnecessary data from device | Date | Mon, 16 Dec 2019 18:47:52 +0100 |
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From: Beniamin Bia <beniamin.bia@analog.com>
commit 341826a065660d1b77d89e6335b6095cd654271c upstream.
When a conversion result is being read from ADC, the driver reads the number of channels + 1 because it thinks that IIO_CHAN_SOFT_TIMESTAMP is also a physical channel. This patch fixes this issue.
Fixes: 2985a5d88455 ("staging: iio: adc: ad7606: Move out of staging") Reported-by: Robert Wörle <rwoerle@mibtec.de> Signed-off-by: Beniamin Bia <beniamin.bia@analog.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/iio/adc/ad7606.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/iio/adc/ad7606.c +++ b/drivers/iio/adc/ad7606.c @@ -57,7 +57,7 @@ static int ad7606_reset(struct ad7606_st static int ad7606_read_samples(struct ad7606_state *st) { - unsigned int num = st->chip_info->num_channels; + unsigned int num = st->chip_info->num_channels - 1; u16 *data = st->data; int ret;
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