[PATCH] iio: dac: ti-dac7612: Replace indio_dev->mlock with own device lock

[Alexandru Ardelean]

From: Sergiu Cuciurean <sergiu.cuciur...@analog.com>

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.cuciur...@analog.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardel...@analog.com>
---
 drivers/iio/dac/ti-dac7612.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/dac/ti-dac7612.c b/drivers/iio/dac/ti-dac7612.c
index 07c9f39d54f1..34c2aec204ef 100644
--- a/drivers/iio/dac/ti-dac7612.c
+++ b/drivers/iio/dac/ti-dac7612.c
@@ -21,6 +21,7 @@ struct dac7612 {
        struct spi_device *spi;
        struct gpio_desc *loaddacs;
        uint16_t cache[2];
+       struct mutex lock;
 
        /*
         * DMA (thus cache coherency maintenance) requires the
@@ -101,9 +102,9 @@ static int dac7612_write_raw(struct iio_dev *iio_dev,
        if (val == priv->cache[chan->channel])
                return 0;
 
-       mutex_lock(&iio_dev->mlock);
+       mutex_lock(&priv->lock);
        ret = dac7612_cmd_single(priv, chan->channel, val);
-       mutex_unlock(&iio_dev->mlock);
+       mutex_unlock(&priv->lock);
 
        return ret;
 }
@@ -145,6 +146,8 @@ static int dac7612_probe(struct spi_device *spi)
        iio_dev->num_channels = ARRAY_SIZE(priv->cache);
        iio_dev->name = spi_get_device_id(spi)->name;
 
+       mutex_init(&priv->lock);
+
        for (i = 0; i < ARRAY_SIZE(priv->cache); i++) {
                ret = dac7612_cmd_single(priv, i, 0);
                if (ret)
-- 
2.25.1