The driver needs to insure atomicity during frequency
changes of bus and device. The iiodev->mlock as used
was not doing that. Replace it with the drivers existing
buffer lock and execute spi_write directly.
Signed-off-by: Arushi Singhal <arushisinghal19971...@gmail.com>
---
drivers/staging/iio/meter/ade7759.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/iio/meter/ade7759.c
b/drivers/staging/iio/meter/ade7759.c
index 0b65f1847510..a5ee4501d30a 100644
--- a/drivers/staging/iio/meter/ade7759.c
+++ b/drivers/staging/iio/meter/ade7759.c
@@ -429,7 +429,7 @@ static ssize_t ade7759_write_frequency(struct device *dev,
if (!val)
return -EINVAL;
- mutex_lock(&indio_dev->mlock);
+ mutex_lock(&st->buf_lock);
t = 27900 / val;
if (t > 0)
@@ -447,10 +447,13 @@ static ssize_t ade7759_write_frequency(struct device *dev,
reg &= ~(3 << 13);
reg |= t << 13;
- ret = ade7759_spi_write_reg_16(dev, ADE7759_MODE, reg);
+ st->tx[0] = ADE7759_WRITE_REG(ADE7759_MODE);
+ st->tx[1] = reg;
+
+ ret = spi_write(st->us, st->tx, 2);
out:
- mutex_unlock(&indio_dev->mlock);
+ mutex_unlock(&st->buf_lock);
return ret ? ret : len;
}
--
2.11.0
--
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