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iio: adc: modify NPCM ADC read reference voltage
Checking if regulator is valid before reading NPCM ADC regulator voltage to avoid system crash in a case the regulator is not valid. Signed-off-by: Tomer Maimon <tmaimon77@gmail.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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@ -149,7 +149,7 @@ static int npcm_adc_read_raw(struct iio_dev *indio_dev,
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}
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_SCALE:
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if (info->vref) {
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if (!IS_ERR(info->vref)) {
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vref_uv = regulator_get_voltage(info->vref);
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*val = vref_uv / 1000;
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} else {
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