mk-rootfs.sh

hc

2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376

 kernel/drivers/iio/gyro/adis16080.c
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@@ -1,9 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * ADIS16080/100 Yaw Rate Gyroscope with SPI driver
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  *
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  * Copyright 2010 Analog Devices Inc.
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- *
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- * Licensed under the GPL-2 or later.
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  */
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 #include <linux/delay.h>
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 #include <linux/mutex.h>
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@@ -39,10 +38,12 @@
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  * @us:			actual spi_device to write data
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  * @info:		chip specific parameters
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  * @buf:		transmit or receive buffer
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+ * @lock:		lock to protect buffer during reads
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  **/
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 struct adis16080_state {
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 	struct spi_device		*us;
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 	const struct adis16080_chip_info *info;
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+	struct mutex			lock;
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 	__be16 buf ____cacheline_aligned;
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 };
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@@ -83,9 +84,9 @@
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 	switch (mask) {
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 	case IIO_CHAN_INFO_RAW:
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-		mutex_lock(&indio_dev->mlock);
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+		mutex_lock(&st->lock);
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 		ret = adis16080_read_sample(indio_dev, chan->address, val);
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-		mutex_unlock(&indio_dev->mlock);
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+		mutex_unlock(&st->lock);
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 		return ret ? ret : IIO_VAL_INT;
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 	case IIO_CHAN_INFO_SCALE:
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 		switch (chan->type) {
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@@ -197,6 +198,8 @@
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 	/* this is only used for removal purposes */
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 	spi_set_drvdata(spi, indio_dev);
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+	mutex_init(&st->lock);
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+
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 	/* Allocate the comms buffers */
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 	st->us = spi;
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 	st->info = &adis16080_chip_info[id->driver_data];
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@@ -204,7 +207,6 @@
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 	indio_dev->name = spi->dev.driver->name;
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 	indio_dev->channels = adis16080_channels;
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 	indio_dev->num_channels = ARRAY_SIZE(adis16080_channels);
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-	indio_dev->dev.parent = &spi->dev;
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 	indio_dev->info = &adis16080_info;
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 	indio_dev->modes = INDIO_DIRECT_MODE;
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