On Wed, Jun 15, 2022 at 02:15:33PM +0100, Robin Murphy wrote: > Put simply, if you want to call dma_map_single() on a buffer, then that > buffer needs to be allocated with kmalloc() (or technically alloc_pages(), > but then dma_map_page() would make more sense when dealing with entire > pages.
Yes. It sounds like the memory here comes from the dma coherent allocator, in which case the code need to use the address returned by that and not create another mapping. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
