diff options
| author | Alexandru Ardelean <alexandru.ardelean@analog.com> | 2019-05-30 16:18:09 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2019-06-17 23:06:47 +0300 |
| commit | dbcf6b5d2625b904f13810b168773b05d891204b (patch) | |
| tree | 87c821c831af398a4fb94c603bba6d85fe09f261 /drivers/iio/amplifiers | |
| parent | 38ffa3a34cb04c378c32c04337d0b98247a04012 (diff) | |
| download | linux-dbcf6b5d2625b904f13810b168773b05d891204b.tar.xz | |
iio: amplifiers: ad8366: use own lock to guard state
This driver is still using iio_dev's mlock to guard against inconsistent
state. This has been discouraged for some time.
This change switches to using it's own mutex, defined on the state struct.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/amplifiers')
| -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; |