diff options
Diffstat (limited to 'drivers/iio/amplifiers/ad8366.c')
| -rw-r--r-- | drivers/iio/amplifiers/ad8366.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c index 82ac15914ff3..24ff5475d9f2 100644 --- a/drivers/iio/amplifiers/ad8366.c +++ b/drivers/iio/amplifiers/ad8366.c @@ -21,6 +21,7 @@ struct ad8366_state { struct spi_device *spi; struct regulator *reg; + struct mutex lock; /* protect sensor state */ unsigned char ch[2]; /* * DMA (thus cache coherency maintenance) requires the @@ -58,7 +59,7 @@ static int ad8366_read_raw(struct iio_dev *indio_dev, int ret; unsigned code; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); switch (m) { case IIO_CHAN_INFO_HARDWAREGAIN: code = st->ch[chan->channel]; @@ -73,7 +74,7 @@ static int ad8366_read_raw(struct iio_dev *indio_dev, default: ret = -EINVAL; } - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return ret; }; @@ -99,7 +100,7 @@ static int ad8366_write_raw(struct iio_dev *indio_dev, code = (code - 4500) / 253; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); switch (mask) { case IIO_CHAN_INFO_HARDWAREGAIN: st->ch[chan->channel] = code; @@ -108,7 +109,7 @@ static int ad8366_write_raw(struct iio_dev *indio_dev, default: ret = -EINVAL; } - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return ret; } @@ -151,6 +152,7 @@ static int ad8366_probe(struct spi_device *spi) } spi_set_drvdata(spi, indio_dev); + mutex_init(&st->lock); st->spi = spi; indio_dev->dev.parent = &spi->dev; |