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iio: adc: modify NPCM ADC read reference voltage
author
Tomer Maimon
<tmaimon77@gmail.com>
Sun, 7 Apr 2019 08:19:28 +0000
(11:19 +0300)
committer
Jonathan Cameron
<Jonathan.Cameron@huawei.com>
Sun, 7 Apr 2019 10:26:47 +0000
(11:26 +0100)
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>
drivers/iio/adc/npcm_adc.c
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diff --git
a/drivers/iio/adc/npcm_adc.c
b/drivers/iio/adc/npcm_adc.c
index
9e25bbe
..
193b3b8
100644
(file)
--- 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_dev *indio_dev,
}
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 {