[PATCH v3 3/4] dmatest: add dmaengine_slave_config for DMA_MEMCPY

[zhangfei gao]

On Tue, Aug 14, 2012 at 4:20 PM, Russell King - ARM Linux
<linux at arm.linux.org.uk> wrote:
> On Tue, Aug 14, 2012 at 12:11:58PM +0800, Zhangfei Gao wrote:
>> Set direction to DMA_MEM_TO_MEM
>> DMA driver may require such configure info
>
> No, this is wrong.  By default, any channel being asked to do memcpy
> should deal with the channel configuration itself and not require it
> to be set - otherwise this breaks the async_tx API.
>
> So consider that dma-test found a bug in your driver which needs fixing.

Thanks Russell for the info.

Really not know DMA_MEM_TO_MEM should be set as default.
>From include/linux/dmaengine.h only find "DMA_ASYNC_TX capability
is automatically set as dma devices are registered".

Will change driver and set config as DMA_MEM_TO_MEM as default setting.

Thanks