From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Converts from using pm_runtime_get_sync() with no error handling over
to pm_runtime_resume_and_get() which will ensure we don't end up
holding a reference. Ensure this error return is then handled at
calls to mlx90614_power_get(). These are all direct returns.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
---
drivers/iio/temperature/mlx90614.c | 25 ++++++++++++++++++++-----
1 file changed, 20 insertions(+), 5 deletions(-)
diff --git a/drivers/iio/temperature/mlx90614.c b/drivers/iio/temperature/mlx90614.c
index ef0fec94d269..afcb10ea7c44 100644
--- a/drivers/iio/temperature/mlx90614.c
+++ b/drivers/iio/temperature/mlx90614.c
@@ -176,11 +176,14 @@ static inline s32 mlx90614_iir_search(const struct i2c_client *client,
static int mlx90614_power_get(struct mlx90614_data *data, bool startup)
{
unsigned long now;
+ int ret;
if (!data->wakeup_gpio)
return 0;
- pm_runtime_get_sync(&data->client->dev);
+ ret = pm_runtime_resume_and_get(&data->client->dev);
+ if (ret < 0)
+ return ret;
if (startup) {
now = jiffies;
@@ -267,7 +270,10 @@ static int mlx90614_read_raw(struct iio_dev *indio_dev,
*val = MLX90614_CONST_SCALE;
return IIO_VAL_INT;
case IIO_CHAN_INFO_CALIBEMISSIVITY: /* 1/65535 / LSB */
- mlx90614_power_get(data, false);
+ ret = mlx90614_power_get(data, false);
+ if (ret < 0)
+ return ret;
+
mutex_lock(&data->lock);
ret = i2c_smbus_read_word_data(data->client,
MLX90614_EMISSIVITY);
@@ -287,7 +293,10 @@ static int mlx90614_read_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT_PLUS_NANO;
case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: /* IIR setting with
FIR = 1024 */
- mlx90614_power_get(data, false);
+ ret = mlx90614_power_get(data, false);
+ if (ret < 0)
+ return ret;
+
mutex_lock(&data->lock);
ret = i2c_smbus_read_word_data(data->client, MLX90614_CONFIG);
mutex_unlock(&data->lock);
@@ -319,7 +328,10 @@ static int mlx90614_write_raw(struct iio_dev *indio_dev,
val = val * MLX90614_CONST_RAW_EMISSIVITY_MAX +
val2 / MLX90614_CONST_EMISSIVITY_RESOLUTION;
- mlx90614_power_get(data, false);
+ ret = mlx90614_power_get(data, false);
+ if (ret < 0)
+ return ret;
+
mutex_lock(&data->lock);
ret = mlx90614_write_word(data->client, MLX90614_EMISSIVITY,
val);
@@ -331,7 +343,10 @@ static int mlx90614_write_raw(struct iio_dev *indio_dev,
if (val < 0 || val2 < 0)
return -EINVAL;
- mlx90614_power_get(data, false);
+ ret = mlx90614_power_get(data, false);
+ if (ret < 0)
+ return ret;
+
mutex_lock(&data->lock);
ret = mlx90614_iir_search(data->client,
val * 100 + val2 / 10000);
--
2.31.1
