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SubjectRe: [RFC v3 4/7] dmaengine: Add slave DMA interface
On Feb 12, 2008 9:43 AM, Haavard Skinnemoen <hskinnemoen@atmel.com> wrote:
[..]
> /**
> + * struct dma_slave_descriptor - extended DMA descriptor for slave DMA
> + * @async_tx: async transaction descriptor
> + * @client_node: for use by the client, for example when operating on
> + * scatterlists.
> + */
> +struct dma_slave_descriptor {
> + struct dma_async_tx_descriptor txd;
> + struct list_head client_node;
> +};

Can you explain a bit why client_node is needed? I do not think we
need dma_slave_descriptor if dma_unmap data / control is added to
dma_async_tx_descriptor. Hmm?


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