Introduce new linux/cleanup.h with the guard(mutex) functionality.
Suggested-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Suggested-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Vasileios Amoiridis <vassilisamir@xxxxxxxxx>
---
drivers/iio/pressure/bmp280-core.c | 131 ++++++++++++-----------------
1 file changed, 56 insertions(+), 75 deletions(-)
diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index a864f8db8e24..eed356bcf8a2 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -27,6 +27,7 @@
#include <linux/bitops.h>
#include <linux/bitfield.h>
+#include <linux/cleanup.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/device.h>
@@ -508,77 +509,67 @@ static int bme280_read_humid(struct bmp280_data *data, int *val, int *val2)
return IIO_VAL_INT;
}
-static int bmp280_read_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int *val, int *val2, long mask)
+static int bmp280_read_raw_impl(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
{
struct bmp280_data *data = iio_priv(indio_dev);
- int ret;
- pm_runtime_get_sync(data->dev);
- mutex_lock(&data->lock);
+ guard(mutex)(&data->lock);
switch (mask) {
case IIO_CHAN_INFO_PROCESSED:
switch (chan->type) {
case IIO_HUMIDITYRELATIVE:
- ret = data->chip_info->read_humid(data, val, val2);
- break;
+ return data->chip_info->read_humid(data, val, val2);
case IIO_PRESSURE:
- ret = data->chip_info->read_press(data, val, val2);
- break;
+ return data->chip_info->read_press(data, val, val2);
case IIO_TEMP:
- ret = data->chip_info->read_temp(data, val, val2);
- break;
+ return data->chip_info->read_temp(data, val, val2);
default:
- ret = -EINVAL;
- break;
+ return -EINVAL;
}
- break;
case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
switch (chan->type) {
case IIO_HUMIDITYRELATIVE:
*val = 1 << data->oversampling_humid;
- ret = IIO_VAL_INT;
- break;
+ return IIO_VAL_INT;
case IIO_PRESSURE:
*val = 1 << data->oversampling_press;
- ret = IIO_VAL_INT;
- break;
+ return IIO_VAL_INT;
case IIO_TEMP:
*val = 1 << data->oversampling_temp;
- ret = IIO_VAL_INT;
- break;
+ return IIO_VAL_INT;
default:
- ret = -EINVAL;
- break;
+ return -EINVAL;
}
- break;
case IIO_CHAN_INFO_SAMP_FREQ:
- if (!data->chip_info->sampling_freq_avail) {
- ret = -EINVAL;
- break;
- }
+ if (!data->chip_info->sampling_freq_avail)
+ return -EINVAL;
*val = data->chip_info->sampling_freq_avail[data->sampling_freq][0];
*val2 = data->chip_info->sampling_freq_avail[data->sampling_freq][1];
- ret = IIO_VAL_INT_PLUS_MICRO;
- break;
+ return IIO_VAL_INT_PLUS_MICRO;
case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
- if (!data->chip_info->iir_filter_coeffs_avail) {
- ret = -EINVAL;
- break;
- }
+ if (!data->chip_info->iir_filter_coeffs_avail)
+ return -EINVAL;
*val = (1 << data->iir_filter_coeff) - 1;
- ret = IIO_VAL_INT;
- break;
+ return IIO_VAL_INT;
default:
- ret = -EINVAL;
- break;
+ return -EINVAL;
}
+}
+
+static int bmp280_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct bmp280_data *data = iio_priv(indio_dev);
+ int ret;
- mutex_unlock(&data->lock);
+ pm_runtime_get_sync(data->dev);
+ ret = bmp280_read_raw_impl(indio_dev, chan, val, val2, mask);
pm_runtime_mark_last_busy(data->dev);
pm_runtime_put_autosuspend(data->dev);
@@ -710,12 +701,13 @@ static int bmp280_write_iir_filter_coeffs(struct bmp280_data *data, int val)
return -EINVAL;
}
-static int bmp280_write_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int val, int val2, long mask)
+static int bmp280_write_raw_impl(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
{
struct bmp280_data *data = iio_priv(indio_dev);
- int ret = 0;
+
+ guard(mutex)(&data->lock);
/*
* Helper functions to update sensor running configuration.
@@ -725,45 +717,36 @@ static int bmp280_write_raw(struct iio_dev *indio_dev,
*/
switch (mask) {
case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
- pm_runtime_get_sync(data->dev);
- mutex_lock(&data->lock);
switch (chan->type) {
case IIO_HUMIDITYRELATIVE:
- ret = bme280_write_oversampling_ratio_humid(data, val);
- break;
+ return bme280_write_oversampling_ratio_humid(data, val);
case IIO_PRESSURE:
- ret = bmp280_write_oversampling_ratio_press(data, val);
- break;
+ return bmp280_write_oversampling_ratio_press(data, val);
case IIO_TEMP:
- ret = bmp280_write_oversampling_ratio_temp(data, val);
- break;
+ return bmp280_write_oversampling_ratio_temp(data, val);
default:
- ret = -EINVAL;
- break;
+ return -EINVAL;
}
- mutex_unlock(&data->lock);
- pm_runtime_mark_last_busy(data->dev);
- pm_runtime_put_autosuspend(data->dev);
- break;
case IIO_CHAN_INFO_SAMP_FREQ:
- pm_runtime_get_sync(data->dev);
- mutex_lock(&data->lock);
- ret = bmp280_write_sampling_frequency(data, val, val2);
- mutex_unlock(&data->lock);
- pm_runtime_mark_last_busy(data->dev);
- pm_runtime_put_autosuspend(data->dev);
- break;
+ return bmp280_write_sampling_frequency(data, val, val2);
case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
- pm_runtime_get_sync(data->dev);
- mutex_lock(&data->lock);
- ret = bmp280_write_iir_filter_coeffs(data, val);
- mutex_unlock(&data->lock);
- pm_runtime_mark_last_busy(data->dev);
- pm_runtime_put_autosuspend(data->dev);
- break;
+ return bmp280_write_iir_filter_coeffs(data, val);
default:
return -EINVAL;
}
+}
+
+static int bmp280_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct bmp280_data *data = iio_priv(indio_dev);
+ int ret;
+
+ pm_runtime_get_sync(data->dev);
+ ret = bmp280_write_raw_impl(indio_dev, chan, val, val2, mask);
+ pm_runtime_mark_last_busy(data->dev);
+ pm_runtime_put_autosuspend(data->dev);
return ret;
}
@@ -1564,7 +1547,7 @@ static int bmp580_nvmem_read(void *priv, unsigned int offset, void *val,
int ret, addr;
pm_runtime_get_sync(data->dev);
- mutex_lock(&data->lock);
+ guard(mutex)(&data->lock);
/* Set sensor in standby mode */
ret = regmap_update_bits(data->regmap, BMP580_REG_ODR_CONFIG,
@@ -1606,7 +1589,6 @@ static int bmp580_nvmem_read(void *priv, unsigned int offset, void *val,
exit:
/* Restore chip config */
data->chip_info->chip_config(data);
- mutex_unlock(&data->lock);
pm_runtime_mark_last_busy(data->dev);
pm_runtime_put_autosuspend(data->dev);
return ret;
@@ -1620,7 +1602,7 @@ static int bmp580_nvmem_write(void *priv, unsigned int offset, void *val,
int ret, addr;
pm_runtime_get_sync(data->dev);
- mutex_lock(&data->lock);
+ guard(mutex)(&data->lock);
/* Set sensor in standby mode */
ret = regmap_update_bits(data->regmap, BMP580_REG_ODR_CONFIG,
@@ -1671,7 +1653,6 @@ static int bmp580_nvmem_write(void *priv, unsigned int offset, void *val,
exit:
/* Restore chip config */
data->chip_info->chip_config(data);
- mutex_unlock(&data->lock);
pm_runtime_mark_last_busy(data->dev);
pm_runtime_put_autosuspend(data->dev);
return ret;
--
2.25.1
