| Message ID | 20200426073817.33307-2-alexandru.ardelean@analog.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v5,1/6] iio: buffer: add back-ref from iio_buffer to iio_dev | expand |
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index eae39eaf49af..bc5050191f51 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -1477,5 +1477,7 @@ void iio_device_attach_buffer(struct iio_dev *indio_dev, struct iio_buffer *buffer) { indio_dev->buffer = iio_buffer_get(buffer); + + indio_dev->buffer->indio_dev = indio_dev; } EXPORT_SYMBOL_GPL(iio_device_attach_buffer); diff --git a/include/linux/iio/buffer_impl.h b/include/linux/iio/buffer_impl.h index a63dc07b7350..67d73d465e02 100644 --- a/include/linux/iio/buffer_impl.h +++ b/include/linux/iio/buffer_impl.h @@ -69,6 +69,9 @@ struct iio_buffer_access_funcs { * those writing new buffer implementations. */ struct iio_buffer { + /** @indio_dev: IIO device to which this buffer belongs to. */ + struct iio_dev *indio_dev; + /** @length: Number of datums in buffer. */ unsigned int length;
An IIO device will have multiple buffers, but it shouldn't be allowed that an IIO buffer should belong to more than 1 IIO device. Once things get moved more from IIO device to the IIO buffer, and an IIO device will be able to have more than 1 buffer attached, there will be a need for a back-ref to the IIO device [from the IIO buffer]. This change adds that. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> --- drivers/iio/industrialio-buffer.c | 2 ++ include/linux/iio/buffer_impl.h | 3 +++ 2 files changed, 5 insertions(+)