From: Tomer Maimon <[email protected]> commit 4e63ed6b90803eeb400c392e9ff493200d926b06 upstream.
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 <[email protected]> Cc: <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/iio/adc/npcm_adc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/iio/adc/npcm_adc.c +++ b/drivers/iio/adc/npcm_adc.c @@ -149,7 +149,7 @@ static int npcm_adc_read_raw(struct iio_ } return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: - if (info->vref) { + if (!IS_ERR(info->vref)) { vref_uv = regulator_get_voltage(info->vref); *val = vref_uv / 1000; } else {
