Commit c1d0af1a authored by Christoph Hellwig's avatar Christoph Hellwig

kernel/dma/direct: take DMA offset into account in dma_direct_supported

When a device has a DMA offset the dma capable result will change due
to the difference between the physical and DMA address.  Take that into
account.
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: default avatarRobin Murphy <robin.murphy@arm.com>
parent 5b394b2d
......@@ -168,7 +168,7 @@ int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
int dma_direct_supported(struct device *dev, u64 mask)
{
#ifdef CONFIG_ZONE_DMA
if (mask < DMA_BIT_MASK(ARCH_ZONE_DMA_BITS))
if (mask < phys_to_dma(dev, DMA_BIT_MASK(ARCH_ZONE_DMA_BITS)))
return 0;
#else
/*
......@@ -177,7 +177,7 @@ int dma_direct_supported(struct device *dev, u64 mask)
* memory, or by providing a ZONE_DMA32. If neither is the case, the
* architecture needs to use an IOMMU instead of the direct mapping.
*/
if (mask < DMA_BIT_MASK(32))
if (mask < phys_to_dma(dev, DMA_BIT_MASK(32)))
return 0;
#endif
/*
......
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