Messages in this thread | | | Date | Tue, 15 Jan 2019 14:37:54 +0100 | From | Christoph Hellwig <> | Subject | Re: [PATCH 2/3] dma: Introduce dma_max_mapping_size() |
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> +size_t dma_direct_max_mapping_size(struct device *dev) > +{ > + /* > + * Return the minimum of the direct DMA limit and the SWIOTLB limit. > + * Since direct DMA has no limit, it is fine to just return the SWIOTLB > + * limit. > + */ > + return swiotlb_max_mapping_size(dev);
Well, if we don't actually use the swiotlb buffers despite it being compiled in or even allocated we don't need the limit.
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