> Thanks for clarifying - as you say, the spec is specific to PCI.
> Our silicon has its own host interface which was confused by a length of zero
> !
You aren't the first. If you look at the current tree you'll see we now
have
ata_dumb_qc_prep()
for interfaces that think 0x0000 is zero. Set that as your qc_prep method
and set sg_tablesize in the driver to LIBATA_DUMB_MAX_PRD and it should
work (we have to use a smaller sglist limit as the worst case is now 2
entries per 64K block)
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