iio: kfifo: Add resource management devm_iio_kfifo_allocate/free

  devm_iio_device_free()

  devm_iio_device_register()

  devm_iio_device_unregister()

  devm_iio_kfifo_allocate()

  devm_iio_kfifo_free()

  devm_iio_trigger_alloc()

  devm_iio_trigger_free()

}

EXPORT_SYMBOL(iio_kfifo_free);

static void devm_iio_kfifo_release(struct device *dev, void *res)

{

	iio_kfifo_free(*(struct iio_buffer **)res);

}

static int devm_iio_kfifo_match(struct device *dev, void *res, void *data)

{

	struct iio_buffer **r = res;

	if (WARN_ON(!r || !*r))

		return 0;

	return *r == data;

}

/**

 * devm_iio_fifo_allocate - Resource-managed iio_kfifo_allocate()

 * @dev:		Device to allocate kfifo buffer for

 *

 * RETURNS:

 * Pointer to allocated iio_buffer on success, NULL on failure.

 */

struct iio_buffer *devm_iio_kfifo_allocate(struct device *dev)

{

	struct iio_buffer **ptr, *r;

	ptr = devres_alloc(devm_iio_kfifo_release, sizeof(*ptr), GFP_KERNEL);

	if (!ptr)

		return NULL;

	r = iio_kfifo_allocate();

	if (r) {

		*ptr = r;

		devres_add(dev, ptr);

	} else {

		devres_free(ptr);

	}

	return r;

}

EXPORT_SYMBOL(devm_iio_kfifo_allocate);

/**

 * devm_iio_fifo_free - Resource-managed iio_kfifo_free()

 * @dev:		Device the buffer belongs to

 * @r:			The buffer associated with the device

 */

void devm_iio_kfifo_free(struct device *dev, struct iio_buffer *r)

{

	WARN_ON(devres_release(dev, devm_iio_kfifo_release,

			       devm_iio_kfifo_match, r));

}

EXPORT_SYMBOL(devm_iio_kfifo_free);

MODULE_LICENSE("GPL");

struct iio_buffer *iio_kfifo_allocate(void);

void iio_kfifo_free(struct iio_buffer *r);

struct iio_buffer *devm_iio_kfifo_allocate(struct device *dev);

void devm_iio_kfifo_free(struct device *dev, struct iio_buffer *r);

#endif