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staging:iio:ad2s90: Make read_raw return spi_read's error code 

Previously, when spi_read returned an error code inside ad2s90_read_raw,
the code was ignored and IIO_VAL_INT was returned. This patch makes the
function return the error code returned by spi_read when it fails.

Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Matheus Tavares 2018-11-03 19:49:43 -03:00 committed by Jonathan Cameron
parent 5ccc612b83
commit 070e8c7da1
1 changed files with 4 additions and 3 deletions
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7
drivers/staging/iio/resolver/ad2s90.c
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@ -36,11 +36,12 @@ static int ad2s90_read_raw(struct iio_dev *indio_dev,
mutex_lock(&st->lock);
ret = spi_read(st->sdev, st->rx, 2);
if (ret)
goto error_ret;
if (ret < 0) {
mutex_unlock(&st->lock);
return ret;
}
*val = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
error_ret:
mutex_unlock(&st->lock);
return IIO_VAL_INT;