Re: [GIT PULL] dma mapping fixes for 4.17-rc3

[David Rientjes]

On Tue, 24 Apr 2018, Christoph Hellwig wrote:

> On Tue, Apr 24, 2018 at 11:54:26PM -0700, David Rientjes wrote:
> > Shouldn't that test for dev->coherent_dma_mask < DMA_BIT_MASK(32) be more 
> > accurately <=? 
> 
> No, it should really be <.  The exactly 32-bit case is already covered
> with GFP_DMA32.  Eventualy it should be < 24-bit with a separate
> GFP_DMA32 case for > 32-bit && < 64-bit.  Takashi has been working on
> that, but it is 4.18 material.
> 

Ack, thanks.