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Subject[PATCH] iio: dac: ad5761: Replace indio_dev->mlock with own device lock
Date
As part of the general cleanup of indio_dev->mlock, this change replaces
it with a local lock on the device's state structure.

Signed-off-by: Sergiu Cuciurean <sergiu.cuciurean@analog.com>
---
drivers/iio/dac/ad5761.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/dac/ad5761.c b/drivers/iio/dac/ad5761.c
index 4fb42b743f0f..67179944e5c5 100644
--- a/drivers/iio/dac/ad5761.c
+++ b/drivers/iio/dac/ad5761.c
@@ -57,11 +57,13 @@ enum ad5761_supported_device_ids {
* @use_intref: true when the internal voltage reference is used
* @vref: actual voltage reference in mVolts
* @range: output range mode used
+ * @lock lock to protect the data buffer during SPI ops
* @data: cache aligned spi buffer
*/
struct ad5761_state {
struct spi_device *spi;
struct regulator *vref_reg;
+ struct mutex lock;

bool use_intref;
int vref;
@@ -124,9 +126,9 @@ static int ad5761_spi_write(struct iio_dev *indio_dev, u8 addr, u16 val)
struct ad5761_state *st = iio_priv(indio_dev);
int ret;

- mutex_lock(&indio_dev->mlock);
+ mutex_lock(&st->lock);
ret = _ad5761_spi_write(st, addr, val);
- mutex_unlock(&indio_dev->mlock);
+ mutex_unlock(&st->lock);

return ret;
}
@@ -163,9 +165,9 @@ static int ad5761_spi_read(struct iio_dev *indio_dev, u8 addr, u16 *val)
struct ad5761_state *st = iio_priv(indio_dev);
int ret;

- mutex_lock(&indio_dev->mlock);
+ mutex_lock(&st->lock);
ret = _ad5761_spi_read(st, addr, val);
- mutex_unlock(&indio_dev->mlock);
+ mutex_unlock(&st->lock);

return ret;
}
@@ -368,6 +370,8 @@ static int ad5761_probe(struct spi_device *spi)
if (pdata)
voltage_range = pdata->voltage_range;

+ mutex_init(&st->lock);
+
ret = ad5761_spi_set_range(st, voltage_range);
if (ret)
goto disable_regulator_err;
--
2.17.1
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