diff options
| -rw-r--r-- | drivers/staging/iio/meter/ade7753.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/staging/iio/meter/ade7753.c b/drivers/staging/iio/meter/ade7753.c index 98993f8b85bf..b704b24b34db 100644 --- a/drivers/staging/iio/meter/ade7753.c +++ b/drivers/staging/iio/meter/ade7753.c @@ -81,10 +81,12 @@ * @tx: transmit buffer * @rx: receive buffer * @buf_lock: mutex to protect tx and rx + * @lock: protect sensor data **/ struct ade7753_state { struct spi_device *us; struct mutex buf_lock; + struct mutex lock; /* protect sensor data */ u8 tx[ADE7753_MAX_TX] ____cacheline_aligned; u8 rx[ADE7753_MAX_RX]; }; @@ -483,7 +485,7 @@ static ssize_t ade7753_write_frequency(struct device *dev, if (!val) return -EINVAL; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); t = 27900 / val; if (t > 0) @@ -504,7 +506,7 @@ static ssize_t ade7753_write_frequency(struct device *dev, ret = ade7753_spi_write_reg_16(dev, ADE7753_MODE, reg); out: - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return ret ? ret : len; } @@ -579,6 +581,7 @@ static int ade7753_probe(struct spi_device *spi) st = iio_priv(indio_dev); st->us = spi; mutex_init(&st->buf_lock); + mutex_init(&st->lock); indio_dev->name = spi->dev.driver->name; indio_dev->dev.parent = &spi->dev; |