Grant> Christoph is right. Even if the code works, it's risky to
Grant> muck with the dma_addr_t contents. I'll try to look at this
Grant> tomorrow and if I have a better idea, propose it. (I'm
Grant> pessimistic that I'll have a better idea though)
I don't think I buy this. The DMA mapping API is giving us a
gather/scatter list where each entry is a dma address X and a length
Y. The only manipulation we're doing is feeding this to the hardware
as a list of chunks at addresses X, X + PAGE_SIZE, X + 2 * PAGE_SIZE,
on up to whatever is required to cover the length Y. This is exactly
what any bus master would do when performing DMA, so I don't see how
it is incorrect.
- R.
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