diff options
| -rw-r--r-- | drivers/iio/adc/rzg2l_adc.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/iio/adc/rzg2l_adc.c b/drivers/iio/adc/rzg2l_adc.c index aa471fb495dc..7da84224a292 100644 --- a/drivers/iio/adc/rzg2l_adc.c +++ b/drivers/iio/adc/rzg2l_adc.c @@ -8,6 +8,7 @@ */ #include <linux/bitfield.h> +#include <linux/cleanup.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/iio/iio.h> @@ -220,21 +221,21 @@ static int rzg2l_adc_read_raw(struct iio_dev *indio_dev, u8 ch; switch (mask) { - case IIO_CHAN_INFO_RAW: + case IIO_CHAN_INFO_RAW: { if (chan->type != IIO_VOLTAGE) return -EINVAL; - mutex_lock(&adc->lock); + guard(mutex)(&adc->lock); + ch = chan->channel & RZG2L_ADC_CHN_MASK; ret = rzg2l_adc_conversion(indio_dev, adc, ch); - if (ret) { - mutex_unlock(&adc->lock); + if (ret) return ret; - } + *val = adc->last_val[ch]; - mutex_unlock(&adc->lock); return IIO_VAL_INT; + } default: return -EINVAL; |