Re: [PATCH 4/5] dma-direct: implement complete bus_dma_mask handling

[Robin Murphy]

On 27/09/18 17:27, Christoph Hellwig wrote:
> On Thu, Sep 27, 2018 at 05:14:56PM +0100, Robin Murphy wrote:
> > > This just seemed more readable to me than min_not_zero, but if others
> > > prefer min_not_zero I can switch.
> >
> > Nah, just checking whether there were any intentionally different
> > assumptions compared to the couple of other places in the patch where
> > min_not_zero() *is* used. If it's purely a style thing then no worries
> > (personally I'd have written it yet another way anyway).
>
> I'm curious: how would you have written it?

Come to think of it, I actually already have, in iommu-dma:

	if (dev->bus_dma_mask)
		mask &= dev->bus_dma_mask;

but of course it's not so pretty for those cases where you don't already 
have the local variable ready to go.

Robin.