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iio: adc: stm32: fix bad error check on max_channels

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Fix a bad error check when counting 'st,adc-channels' array elements.
This is seen when all channels are in use simultaneously.

Fixes: 64ad7f643 ("iio: adc: stm32: introduce compatible data cfg")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Fabrice Gasnier 2017-09-18 18:24:15 +02:00 • committed by Jonathan Cameron
commit 4fb840c95f
1 changed files with 1 additions and 1 deletions
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drivers/iio/adc/stm32-adc.c
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@ -1656,7 +1656,7 @@ static int stm32_adc_chan_of_init(struct iio_dev *indio_dev)
num_channels = of_property_count_u32_elems(node, "st,adc-channels");
if (num_channels < 0 ||
num_channels >= adc_info->max_channels) {
num_channels > adc_info->max_channels) {
dev_err(&indio_dev->dev, "Bad st,adc-channels?\n");
return num_channels < 0 ? num_channels : -EINVAL;
}