@@ -10,6 +10,7 @@
#include <linux/iio/iio.h>
#include <linux/iio/driver.h>
#include <linux/module.h>
+#include <linux/mutex.h>
#include <linux/regulator/consumer.h>
#include "ltc2497.h"
@@ -81,9 +82,9 @@ static int ltc2497core_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_RAW:
- mutex_lock(&indio_dev->mlock);
+ mutex_lock(&ddata->lock);
ret = ltc2497core_read(ddata, chan->address, val);
- mutex_unlock(&indio_dev->mlock);
+ mutex_unlock(&ddata->lock);
if (ret < 0)
return ret;
@@ -169,6 +170,8 @@ int ltc2497core_probe(struct device *dev, struct iio_dev *indio_dev)
struct ltc2497core_driverdata *ddata = iio_priv(indio_dev);
int ret;
+ mutex_init(&ddata->lock);
+
/*
* Keep using dev_name() for the iio_dev's name on some of the parts,
* since updating it would result in a ABI breakage.
@@ -12,6 +12,8 @@ struct ltc2497_chip_info {
struct ltc2497core_driverdata {
struct regulator *ref;
ktime_t time_prev;
+ /* lock to protect against multiple access to the device */
+ struct mutex lock;
const struct ltc2497_chip_info *chip_info;
u8 addr_prev;
int (*result_and_measure)(struct ltc2497core_driverdata *ddata,
The iio_device lock is only meant for internal use. Hence define a device local lock to protect against concurrent accesses. Signed-off-by: Nuno Sá <nuno.sa@analog.com> --- drivers/iio/adc/ltc2497-core.c | 7 +++++-- drivers/iio/adc/ltc2497.h | 2 ++ 2 files changed, 7 insertions(+), 2 deletions(-)