Messages in this thread | | | Date | Wed, 15 Jun 2022 15:17:00 +0200 | From | Christoph Hellwig <> | Subject | Re: helping with remapping vmem for dma |
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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.
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