Jeff Garzik wrote:
As I recall, the 31244 and VSC-7174 always send an interrupt, so the
driver should account for this. I thought we had code already in the
driver to handle this, but perhaps recent changes stomped that.
It would be good to standardize the way we handle these sorts of
controllers, because (I think) Mark Lord has the same problem on
sata_qstor (or pdc_adma?).
sata_qstor has a different problem.
For IDENTIFY and other non-R/W commands, it behaves nicely
as a simple, dumb, PIO style interface.
For regular block I/O R/W commands, it uses full DMA with
the internal host queue, depth=1, *but* requires NIEN=1
during such commands.
It's on my near-term "to fix" list, along with migration to the new EH stuff.
Cheers
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