Re: [PATCH V6 2/3] dma-mapping: Rework dma_get_cache_alignment()function

[Christoph Hellwig]

On Thu, Sep 21, 2017 at 12:28:25PM +0800, éåæ wrote:
> Hi, Christoph,
> 
> I have changed dma_get_cache_alignment's return value, and I don't know whether those drivers want to return ARCH_DMA_MINALIGN unconditionally. So I pass a NULL for those drivers, in order to keep their old behavior.

Per our documentation yes, they do want ARCH_DMA_MINALIGN.  Please
Cc all the driver maintainers on your updated patch so that they can
review it, though.