> It appears that I have found either a hardware error with my copy of that > card, or there is an error > in the ucode13 firmware.
FWIW, the firmware is hardly involved in DMA so that's extremely unlikely. > Between 2.6.24-rc2 and -rc3, code that resulted in the Descriptor Address > Rings having low addresses was removed. At that point, my card failed with a > DMA error. When the > ring buffer is forced to a low address by requesting it with the GFP_DMA > flag, then the card works. > Note that the data buffers for DMA are still at high addresses - only the > ring buffer is low. Maybe the card can't handle high addresses for the buffers or we're doing something wrong with the address (extension) here? johannes
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