Yes. I also remember a time where the dma mask for the DMA API was all
broken too (would not be possible to map the PCI one on top of it),
but I think that got fixed.
I thought it was still broken. Last I compared different asm-* arch implementations of dma_supported(), the semantics were inconsistent. The "mask" was sometimes ignored, sometimes treated as an upper bound on the address, once I recall it even being used as a mask! Some of that inconsistency seemed to come from PCI though.
- Dave
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