iio: pressure: st_pressure: use devm_iio_triggered_buffer_setup() for…

… buffer The st_press_allocate_ring() function calls iio_triggered_buffer_setup() to allocate a triggered buffer. But the same can be done with devm_iio_triggered_buffer_setup() and then the st_press_common_remove() no longer needs to manually deallocate it. We know that the parent of the IIO device is used to manage other instances of the devm unwind, so it can be used in the st_press_allocate_ring() as well. Signed-off-by: Alexandru Ardelean <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Cameron <[email protected]>
ambv · Jul 24, 2021 · 674db1e · 674db1e
1 parent 78a6af3
commit 674db1e
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Showing 3 changed files with 3 additions and 17 deletions.
diff --git a/drivers/iio/pressure/st_pressure.h b/drivers/iio/pressure/st_pressure.h
@@ -43,18 +43,13 @@ static __maybe_unused const struct st_sensors_platform_data default_press_pdata
 
 #ifdef CONFIG_IIO_BUFFER
 int st_press_allocate_ring(struct iio_dev *indio_dev);
-void st_press_deallocate_ring(struct iio_dev *indio_dev);
 int st_press_trig_set_state(struct iio_trigger *trig, bool state);
 #define ST_PRESS_TRIGGER_SET_STATE (&st_press_trig_set_state)
 #else /* CONFIG_IIO_BUFFER */
 static inline int st_press_allocate_ring(struct iio_dev *indio_dev)
 {
 	return 0;
 }
-
-static inline void st_press_deallocate_ring(struct iio_dev *indio_dev)
-{
-}
 #define ST_PRESS_TRIGGER_SET_STATE NULL
 #endif /* CONFIG_IIO_BUFFER */
 

diff --git a/drivers/iio/pressure/st_pressure_buffer.c b/drivers/iio/pressure/st_pressure_buffer.c
@@ -41,13 +41,8 @@ static const struct iio_buffer_setup_ops st_press_buffer_setup_ops = {
 
 int st_press_allocate_ring(struct iio_dev *indio_dev)
 {
-	return iio_triggered_buffer_setup(indio_dev, NULL,
-		&st_sensors_trigger_handler, &st_press_buffer_setup_ops);
-}
-
-void st_press_deallocate_ring(struct iio_dev *indio_dev)
-{
-	iio_triggered_buffer_cleanup(indio_dev);
+	return devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev,
+		NULL, &st_sensors_trigger_handler, &st_press_buffer_setup_ops);
 }
 
 MODULE_AUTHOR("Denis Ciocca <[email protected]>");

diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c
@@ -718,7 +718,7 @@ int st_press_common_probe(struct iio_dev *indio_dev)
 		err = st_sensors_allocate_trigger(indio_dev,
 						  ST_PRESS_TRIGGER_OPS);
 		if (err < 0)
-			goto st_press_probe_trigger_error;
+			return err;
 	}
 
 	err = iio_device_register(indio_dev);
@@ -733,8 +733,6 @@ int st_press_common_probe(struct iio_dev *indio_dev)
 st_press_device_register_error:
 	if (press_data->irq > 0)
 		st_sensors_deallocate_trigger(indio_dev);
-st_press_probe_trigger_error:
-	st_press_deallocate_ring(indio_dev);
 	return err;
 }
 EXPORT_SYMBOL(st_press_common_probe);
@@ -746,8 +744,6 @@ void st_press_common_remove(struct iio_dev *indio_dev)
 	iio_device_unregister(indio_dev);
 	if (press_data->irq > 0)
 		st_sensors_deallocate_trigger(indio_dev);
-
-	st_press_deallocate_ring(indio_dev);
 }
 EXPORT_SYMBOL(st_press_common_remove);