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Subject[PATCH] staging: adis16060_core: Use private driver lock instead of mlock
The IIO subsystem is redefining iio_dev->mlock to be used by
the IIO core only for protecting device operating mode changes.
ie. Changes between INDIO_DIRECT_MODE, INDIO_BUFFER_* modes.

In this driver, mlock was being used to protect hardware state
changes. Replace it with a lock in the devices global data.

Signed-off-by: simran singhal <singhalsimran0@gmail.com>
---
drivers/staging/iio/gyro/adis16060_core.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/iio/gyro/adis16060_core.c b/drivers/staging/iio/gyro/adis16060_core.c
index c9d46e7..90a3a18 100644
--- a/drivers/staging/iio/gyro/adis16060_core.c
+++ b/drivers/staging/iio/gyro/adis16060_core.c
@@ -29,11 +29,13 @@
* @us_r: actual spi_device to read back data
* @buf: transmit or receive buffer
* @buf_lock: mutex to protect tx and rx
+ * @lock: protect sensor state
**/
struct adis16060_state {
struct spi_device *us_w;
struct spi_device *us_r;
struct mutex buf_lock;
+ struct mutex lock; /* protect sensor state */

u8 buf[3] ____cacheline_aligned;
};
@@ -87,7 +89,7 @@ static int adis16060_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_RAW:
/* Take the iio_dev status lock */
- mutex_lock(&indio_dev->mlock);
+ mutex_lock(&st->lock);
ret = adis16060_spi_write(indio_dev, chan->address);
if (ret < 0)
goto out_unlock;
@@ -96,7 +98,7 @@ static int adis16060_read_raw(struct iio_dev *indio_dev,
if (ret < 0)
goto out_unlock;

- mutex_unlock(&indio_dev->mlock);
+ mutex_unlock(&st->lock);
*val = tval;
return IIO_VAL_INT;
case IIO_CHAN_INFO_OFFSET:
@@ -112,7 +114,7 @@ static int adis16060_read_raw(struct iio_dev *indio_dev,
return -EINVAL;

out_unlock:
- mutex_unlock(&indio_dev->mlock);
+ mutex_unlock(&st->lock);
return ret;
}

--
2.7.4
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