[PATCH v3] IMX/SDMA : save the real count for one DMA transaction.

[Vinod Koul]

On Fri, 2011-12-02 at 10:16 +0800, Huang Shijie wrote:
> When we use the SDMA in the UART driver(such as imx6q), we will
> meet one situation:
>   Assume we set 64 bytes for the RX DMA buffer.
>   The RX DMA buffer has received some data, but not full.
>   An Aging DMA request will be received by the SDMA controller if we enable the
>   IDDMAEN(UCR4[6]) in this case.
> 
> So the UART driver needs to know the count of the real received bytes,
> and push them to upper layer.
> 
> Add two new fields to sdmac, and update the `residue` in sdma_tx_status().
> 
> Signed-off-by: Huang Shijie <b32955 at freescale.com>
Applied thanks


-- 
~Vinod