Re: [PATCH 6/6] atmel_serial: Add DMA support

[Haavard Skinnemoen]

On Wed, 23 Jan 2008 15:04:36 +0000
Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> wrote:

> > No, I think GFP_DMA is for legacy ISA DMA and other DMA controllers
> > with addressing limitations. The PDC is capable of accessing the full
> > 32-bit physical address space on both AT91 and AVR32, so no special DMA
> > flags are needed.
> 
> For kernel coherent DMA buffers use the dma_ API to allocate the memory.

Yes, but since we're managing DMA coherency using the streaming DMA
API, we don't really need coherent buffers, right?

Haavard
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