On Thu, 14 May 2020 12:19:38 +0300 Sergiu Cuciurean <[email protected]> wrote:
> 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 <[email protected]> Applied, Thanks, Jonathan > --- > drivers/iio/dac/ad5686.c | 10 ++++++---- > drivers/iio/dac/ad5686.h | 2 ++ > 2 files changed, 8 insertions(+), 4 deletions(-) > > diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c > index e06b29c565b9..8dd67da0a7da 100644 > --- a/drivers/iio/dac/ad5686.c > +++ b/drivers/iio/dac/ad5686.c > @@ -127,9 +127,9 @@ static int ad5686_read_raw(struct iio_dev *indio_dev, > > switch (m) { > case IIO_CHAN_INFO_RAW: > - mutex_lock(&indio_dev->mlock); > + mutex_lock(&st->lock); > ret = st->read(st, chan->address); > - mutex_unlock(&indio_dev->mlock); > + mutex_unlock(&st->lock); > if (ret < 0) > return ret; > *val = (ret >> chan->scan_type.shift) & > @@ -157,12 +157,12 @@ static int ad5686_write_raw(struct iio_dev *indio_dev, > if (val > (1 << chan->scan_type.realbits) || val < 0) > return -EINVAL; > > - mutex_lock(&indio_dev->mlock); > + mutex_lock(&st->lock); > ret = st->write(st, > AD5686_CMD_WRITE_INPUT_N_UPDATE_N, > chan->address, > val << chan->scan_type.shift); > - mutex_unlock(&indio_dev->mlock); > + mutex_unlock(&st->lock); > break; > default: > ret = -EINVAL; > @@ -468,6 +468,8 @@ int ad5686_probe(struct device *dev, > indio_dev->channels = st->chip_info->channels; > indio_dev->num_channels = st->chip_info->num_channels; > > + mutex_init(&st->lock); > + > switch (st->chip_info->regmap_type) { > case AD5310_REGMAP: > cmd = AD5686_CMD_CONTROL_REG; > diff --git a/drivers/iio/dac/ad5686.h b/drivers/iio/dac/ad5686.h > index 70a779939ddb..52009b5eef88 100644 > --- a/drivers/iio/dac/ad5686.h > +++ b/drivers/iio/dac/ad5686.h > @@ -117,6 +117,7 @@ struct ad5686_chip_info { > * @pwr_down_mask: power down mask > * @pwr_down_mode: current power down mode > * @use_internal_vref: set to true if the internal reference voltage > is used > + * @lock lock to protect the data buffer during regmap ops > * @data: spi transfer buffers > */ > > @@ -130,6 +131,7 @@ struct ad5686_state { > ad5686_write_func write; > ad5686_read_func read; > bool use_internal_vref; > + struct mutex lock; > > /* > * DMA (thus cache coherency maintenance) requires the
