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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/iio/pressure/st_pressure_buffer.c
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@@ -1,11 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * STMicroelectronics pressures driver
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  *
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  * Copyright 2013 STMicroelectronics Inc.
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  *
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  * Denis Ciocca <denis.ciocca@st.com>
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- *
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- * Licensed under the GPL-2.
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  */
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 #include <linux/module.h>
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@@ -30,52 +29,17 @@
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 	return st_sensors_set_dataready_irq(indio_dev, state);
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 }
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-static int st_press_buffer_preenable(struct iio_dev *indio_dev)
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+static int st_press_buffer_postenable(struct iio_dev *indio_dev)
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 {
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 	return st_sensors_set_enable(indio_dev, true);
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 }
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-static int st_press_buffer_postenable(struct iio_dev *indio_dev)
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-{
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-	int err;
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-	struct st_sensor_data *press_data = iio_priv(indio_dev);
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-
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-	press_data->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
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-	if (press_data->buffer_data == NULL) {
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-		err = -ENOMEM;
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-		goto allocate_memory_error;
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-	}
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-
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-	err = iio_triggered_buffer_postenable(indio_dev);
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-	if (err < 0)
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-		goto st_press_buffer_postenable_error;
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-
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-	return err;
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-
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-st_press_buffer_postenable_error:
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-	kfree(press_data->buffer_data);
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-allocate_memory_error:
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-	return err;
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-}
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-
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 static int st_press_buffer_predisable(struct iio_dev *indio_dev)
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 {
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-	int err;
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-	struct st_sensor_data *press_data = iio_priv(indio_dev);
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-
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-	err = iio_triggered_buffer_predisable(indio_dev);
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-	if (err < 0)
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-		goto st_press_buffer_predisable_error;
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-
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-	err = st_sensors_set_enable(indio_dev, false);
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-
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-st_press_buffer_predisable_error:
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-	kfree(press_data->buffer_data);
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-	return err;
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+	return st_sensors_set_enable(indio_dev, false);
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 }
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41
 
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 static const struct iio_buffer_setup_ops st_press_buffer_setup_ops = {
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-	.preenable = &st_press_buffer_preenable,
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 	.postenable = &st_press_buffer_postenable,
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 	.predisable = &st_press_buffer_predisable,
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 };