All sections in which the transfer buffer is accessed are already protected by
the IIO device's mlock. So we do not need the extra mutex protecting the buffer.
Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
---
drivers/staging/iio/gyro/adis16080_core.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/drivers/staging/iio/gyro/adis16080_core.c b/drivers/staging/iio/gyro/adis16080_core.c
index 6ff9ffc..55ffe39 100644
--- a/drivers/staging/iio/gyro/adis16080_core.c
+++ b/drivers/staging/iio/gyro/adis16080_core.c
@@ -33,11 +33,9 @@
* struct adis16080_state - device instance specific data
* @us: actual spi_device to write data
* @buf: transmit or receive buffer
- * @buf_lock: mutex to protect tx and rx
**/
struct adis16080_state {
struct spi_device *us;
- struct mutex buf_lock;
__be16 buf ____cacheline_aligned;
};
@@ -59,7 +57,6 @@ static int adis16080_read_sample(struct iio_dev *indio_dev,
},
};
- mutex_lock(&st->buf_lock);
st->buf = cpu_to_be16(addr | ADIS16080_DIN_WRITE);
spi_message_init(&m);
@@ -69,7 +66,6 @@ static int adis16080_read_sample(struct iio_dev *indio_dev,
ret = spi_sync(st->us, &m);
if (ret == 0)
*val = sign_extend32(12, be16_to_cpu(st->buf));
- mutex_unlock(&st->buf_lock);
return ret;
}
@@ -144,7 +140,6 @@ static int adis16080_probe(struct spi_device *spi)
/* Allocate the comms buffers */
st->us = spi;
- mutex_init(&st->buf_lock);
indio_dev->name = spi->dev.driver->name;
indio_dev->channels = adis16080_channels;
--
1.8.0
--
To unsubscribe from this list: send the line "unsubscribe linux-iio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
