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...ice. (Does the ioctl code in question have reason to set or expose no_prefetch?) 3) Bits 0 and 1 of the length field are passed through and placed into the IB entry, but they don't signify length in the DMA request. Bit 0 is labeled an unknown flag, bit 1 specifies use of the non_main transfer counter. DMA transfers can only be whole words, despite pushbuffers not being restricted to whole-word lengths. So there are two ways this can bite: Setting flags we don't mean to set and not transferring trailing bytes in incomplete words. Changes: This PR...