[PATCH v2] dma-mapping: treat dev->bus_dma_mask as a DMA limit

[Nicolas Saenz Julienne]

On Mon, 2019-11-25 at 16:33 +0000, Robin Murphy wrote:
> On 25/11/2019 7:44 am, Christoph Hellwig wrote:
> > On Sat, Nov 23, 2019 at 09:51:08AM -0700, Nathan Chancellor wrote:
> > > Just as an FYI, this introduces a warning on arm32 allyesconfig for me:
> > 
> > I think the dma_limit argument to iommu_dma_alloc_iova should be a u64
> > and/or we need to use min_t and open code the zero exception.
> > 
> > Robin, Nicolas - any opinions?
> 
> Yeah, given that it's always held a mask I'm not entirely sure why it 
> was ever a dma_addr_t rather than a u64. Unless anyone else is desperate 
> to do it I'll get a cleanup patch ready for rc1.

Sounds good to me too

Robin, since I started the mess, I'll be happy to do it if it helps offloading
some work from you.

Regards,
Nicolas

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