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| author | Jani Nikula <jani.nikula@intel.com> | 2020-06-25 18:05:03 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2020-06-25 18:05:03 +0300 |
| commit | 0f69403d2535ffc7200a8414cf3ca66a49b0d741 (patch) | |
| tree | 3ce85dd08359ea872aa8fb9bd12072efdb80a787 /drivers/iio/dac/ad5380.c | |
| parent | 580fbdc5136822208f107500682e50a1cb232e94 (diff) | |
| parent | 0a19b068acc47d05212f03e494381926dc0381e2 (diff) | |
| download | linux-0f69403d2535ffc7200a8414cf3ca66a49b0d741.tar.xz | |
Merge drm/drm-next into drm-intel-next-queued
Catch up with upstream, in particular to get c1e8d7c6a7a6 ("mmap locking
API: convert mmap_sem comments").
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/iio/dac/ad5380.c')
| -rw-r--r-- | drivers/iio/dac/ad5380.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/iio/dac/ad5380.c b/drivers/iio/dac/ad5380.c index 2ebe08326048..b37e5675f716 100644 --- a/drivers/iio/dac/ad5380.c +++ b/drivers/iio/dac/ad5380.c @@ -51,6 +51,7 @@ struct ad5380_chip_info { * @vref_reg: vref supply regulator * @vref: actual reference voltage used in uA * @pwr_down: whether the chip is currently in power down mode + * @lock lock to protect the data buffer during regmap ops */ struct ad5380_state { @@ -59,6 +60,7 @@ struct ad5380_state { struct regulator *vref_reg; int vref; bool pwr_down; + struct mutex lock; }; enum ad5380_type { @@ -98,7 +100,7 @@ static ssize_t ad5380_write_dac_powerdown(struct iio_dev *indio_dev, if (ret) return ret; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); if (pwr_down) ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_DOWN, 0); @@ -107,7 +109,7 @@ static ssize_t ad5380_write_dac_powerdown(struct iio_dev *indio_dev, st->pwr_down = pwr_down; - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return ret ? ret : len; } @@ -390,6 +392,8 @@ static int ad5380_probe(struct device *dev, struct regmap *regmap, indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->num_channels = st->chip_info->num_channels; + mutex_init(&st->lock); + ret = ad5380_alloc_channels(indio_dev); if (ret) { dev_err(dev, "Failed to allocate channel spec: %d\n", ret); |