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SubjectRe: [PATCH 3/5] sparc64/iommu: allow large DMA masks
From: Christoph Hellwig <>
Date: Fri, 15 Feb 2019 15:45:57 +0100

> We've been moving to a model where the device just sets the DMA mask
> supported by it, instead of having to fallback to something it thinks
> the platform might support. Sparc64 is the remaining holdout forcing
> drivers to supply a matching mask. Change dma_4u_supported to just
> check if the supplied dma mask is large enough as nothing in the
> iommu.c code (or the core DMA code) actually looks at the DMA mask
> later on.
> Signed-off-by: Christoph Hellwig <>

Acked-by: David S. Miller <>

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