Commit 780103fe authored by Karol Wrona's avatar Karol Wrona Committed by Jonathan Cameron
Browse files

iio: kfifo: Add resource management devm_iio_kfifo_allocate/free 



iio kfifo allocate/free gained their devm_ wrappers.

Signed-off-by: default avatarKarol Wrona <k.wrona@samsung.com>
Suggested-by: default avatarJonathan Cameron <jic23@kernel.org>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 7ab374a0

Documentation/driver-model/devres.txt

+2 −0
Original line number Diff line number Diff line
@@ -258,6 +258,8 @@ IIO 
  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()

drivers/iio/kfifo_buf.c

+54 −0
Original line number Diff line number Diff line
@@ -164,4 +164,58 @@ void iio_kfifo_free(struct iio_buffer *r) 
}

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");

include/linux/iio/kfifo_buf.h

+3 −0
Original line number Diff line number Diff line
@@ -8,4 +8,7 @@ 
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