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iio: adc: ad7091r-base: Use auto cleanup of locks.

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Done to reduce boilerplate and simplify code flow by allowing early
returns with the lock automatically released.

Reviewed-by: Nuno Sa <nuno.a@analog.com>
Link: https://lore.kernel.org/r/20240128150537.44592-11-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Jonathan Cameron 2024-01-28 15:05:37 +00:00
parent 1fa220ec61
commit 129e8619fc
1 changed files with 8 additions and 17 deletions
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25
drivers/iio/adc/ad7091r-base.c
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@ -86,28 +86,25 @@ static int ad7091r_read_raw(struct iio_dev *iio_dev,
unsigned int read_val;
int ret;
mutex_lock(&st->lock);
guard(mutex)(&st->lock);
switch (m) {
case IIO_CHAN_INFO_RAW:
if (st->mode != AD7091R_MODE_COMMAND) {
ret = -EBUSY;
goto unlock;
}
if (st->mode != AD7091R_MODE_COMMAND)
return -EBUSY;
ret = ad7091r_read_one(iio_dev, chan->channel, &read_val);
if (ret)
goto unlock;
return ret;
*val = read_val;
ret = IIO_VAL_INT;
break;
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
if (st->vref) {
ret = regulator_get_voltage(st->vref);
if (ret < 0)
goto unlock;
return ret;
*val = ret / 1000;
} else {
@ -115,17 +112,11 @@ static int ad7091r_read_raw(struct iio_dev *iio_dev,
}
*val2 = chan->scan_type.realbits;
ret = IIO_VAL_FRACTIONAL_LOG2;
break;
return IIO_VAL_FRACTIONAL_LOG2;
default:
ret = -EINVAL;
break;
return -EINVAL;
}
unlock:
mutex_unlock(&st->lock);
return ret;
}
static int ad7091r_read_event_config(struct iio_dev *indio_dev,