Re: [RFC v3 4/7] dmaengine: Add slave DMA interface

[Dan Williams]

On Feb 12, 2008 9:43 AM, Haavard Skinnemoen <hskinnemoen@xxxxxxxxx> 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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