diff options
Diffstat (limited to 'drivers/iio/buffer/industrialio-triggered-buffer.c')
| -rw-r--r-- | drivers/iio/buffer/industrialio-triggered-buffer.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/drivers/iio/buffer/industrialio-triggered-buffer.c b/drivers/iio/buffer/industrialio-triggered-buffer.c index f77c4538141e..9bf75dee7ff8 100644 --- a/drivers/iio/buffer/industrialio-triggered-buffer.c +++ b/drivers/iio/buffer/industrialio-triggered-buffer.c @@ -1,5 +1,5 @@ // SPDX-License-Identifier: GPL-2.0-only - /* +/* * Copyright (c) 2012 Analog Devices, Inc. * Author: Lars-Peter Clausen <lars@metafoo.de> */ @@ -19,6 +19,7 @@ * @indio_dev: IIO device structure * @h: Function which will be used as pollfunc top half * @thread: Function which will be used as pollfunc bottom half + * @direction: Direction of the data stream (in/out). * @setup_ops: Buffer setup functions to use for this device. * If NULL the default setup functions for triggered * buffers will be used. @@ -38,12 +39,23 @@ int iio_triggered_buffer_setup_ext(struct iio_dev *indio_dev, irqreturn_t (*h)(int irq, void *p), irqreturn_t (*thread)(int irq, void *p), + enum iio_buffer_direction direction, const struct iio_buffer_setup_ops *setup_ops, - const struct attribute **buffer_attrs) + const struct iio_dev_attr **buffer_attrs) { struct iio_buffer *buffer; int ret; + /* + * iio_triggered_buffer_cleanup() assumes that the buffer allocated here + * is assigned to indio_dev->buffer but this is only the case if this + * function is the first caller to iio_device_attach_buffer(). If + * indio_dev->buffer is already set then we can't proceed otherwise the + * cleanup function will try to free a buffer that was not allocated here. + */ + if (indio_dev->buffer) + return -EADDRINUSE; + buffer = iio_kfifo_allocate(); if (!buffer) { ret = -ENOMEM; @@ -68,6 +80,7 @@ int iio_triggered_buffer_setup_ext(struct iio_dev *indio_dev, /* Flag that polled ring buffering is possible */ indio_dev->modes |= INDIO_BUFFER_TRIGGERED; + buffer->direction = direction; buffer->attrs = buffer_attrs; ret = iio_device_attach_buffer(indio_dev, buffer); @@ -105,13 +118,14 @@ int devm_iio_triggered_buffer_setup_ext(struct device *dev, struct iio_dev *indio_dev, irqreturn_t (*h)(int irq, void *p), irqreturn_t (*thread)(int irq, void *p), + enum iio_buffer_direction direction, const struct iio_buffer_setup_ops *ops, - const struct attribute **buffer_attrs) + const struct iio_dev_attr **buffer_attrs) { int ret; - ret = iio_triggered_buffer_setup_ext(indio_dev, h, thread, ops, - buffer_attrs); + ret = iio_triggered_buffer_setup_ext(indio_dev, h, thread, direction, + ops, buffer_attrs); if (ret) return ret; |