[PATCH v4 4/6] iommu/dma: Pass address limit rather than size to iommu_setup_dma_ops()

[Jean-Philippe Brucker]

On Wed, Jun 16, 2021 at 05:28:59PM +0200, Eric Auger wrote:
> Hi Jean,
> 
> On 6/10/21 9:51 AM, Jean-Philippe Brucker wrote:
> > diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
> > index 4bf1dd3eb041..7bd1d2199141 100644
> > --- a/arch/arm64/mm/dma-mapping.c
> > +++ b/arch/arm64/mm/dma-mapping.c
> > @@ -50,7 +50,7 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
> >  
> >  	dev->dma_coherent = coherent;
> >  	if (iommu)
> > -		iommu_setup_dma_ops(dev, dma_base, size);
> > +		iommu_setup_dma_ops(dev, dma_base, size - dma_base - 1);
> I don't get  size - dma_base - 1?

Because it's wrong, should be dma_base + size - 1. Thanks for catching it!

Thanks,
Jean