>> You are assuming the PCI memory space is prefetchable( no side effect) >> for DMA. >> Is it possible that DMA is from non-prefetchable memory space?
> This should be a safe assumption for this driver. Remember, this > driver just does offload memcpy, from one region to another. So the > PCI memory that you are reading from should be just a buffer of data, > and there should be side-effect of reading it. How about one FIFO buffer?
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