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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/iio/adc/dln2-adc.c
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@@ -1,11 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Driver for the Diolan DLN-2 USB-ADC adapter
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  *
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  * Copyright (c) 2017 Jack Andersen
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License as
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- * published by the Free Software Foundation, version 2.
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  */
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 #include <linux/kernel.h>
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@@ -526,10 +523,6 @@
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 	u16 conflict;
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 	unsigned int trigger_chan;
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-	ret = iio_triggered_buffer_postenable(indio_dev);
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-	if (ret)
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-		return ret;
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-
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 	mutex_lock(&dln2->mutex);
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 	/* Enable ADC */
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@@ -543,7 +536,6 @@
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 				(int)conflict);
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 			ret = -EBUSY;
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 		}
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-		iio_triggered_buffer_predisable(indio_dev);
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 		return ret;
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 	}
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@@ -557,7 +549,6 @@
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 		mutex_unlock(&dln2->mutex);
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 		if (ret < 0) {
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 			dev_dbg(&dln2->pdev->dev, "Problem in %s\n", __func__);
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-			iio_triggered_buffer_predisable(indio_dev);
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 			return ret;
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 		}
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 	} else {
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@@ -570,7 +561,7 @@
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 static int dln2_adc_triggered_buffer_predisable(struct iio_dev *indio_dev)
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 {
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-	int ret, ret2;
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+	int ret;
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 	struct dln2_adc *dln2 = iio_priv(indio_dev);
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 	mutex_lock(&dln2->mutex);
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@@ -587,10 +578,6 @@
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 	mutex_unlock(&dln2->mutex);
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 	if (ret < 0)
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 		dev_dbg(&dln2->pdev->dev, "Problem in %s\n", __func__);
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-
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-	ret2 = iio_triggered_buffer_predisable(indio_dev);
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-	if (ret == 0)
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-		ret = ret2;
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 	return ret;
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 }
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@@ -654,7 +641,6 @@
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 	IIO_CHAN_SOFT_TIMESTAMP_ASSIGN(dln2->iio_channels[i], i);
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 	indio_dev->name = DLN2_ADC_MOD_NAME;
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-	indio_dev->dev.parent = dev;
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 	indio_dev->info = &dln2_adc_info;
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 	indio_dev->modes = INDIO_DIRECT_MODE;
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 	indio_dev->channels = dln2->iio_channels;