On 10/04/2010 03:35 PM, Mark Lord wrote:
On 10-10-04 03:27 PM, Jeff Garzik wrote:
On 10/04/2010 02:50 PM, Mark Lord wrote:
I've dug a bit deeper, and worked around the issue.
It seems that libata is not always happy about DATA-xfer commands
that also have the check-sense bit set (0x20 in cdb[2]).
Perhaps that's not even valid in SCSI ??
Very interesting... poking at this now on pre- and post-libahci
platforms. As you said, don't see much difference in behavior WRT
libahci -- which I expected/hoped, since that split shouldn't have
changed behavior at all[1].
Yeah. Non-data commands still get a (correct) updated result_tf from AHCI,
but data commands don't get one, unless they fail.
Weird, but I've worked around it now.
Might be that we just get a single-bit "OK" notification from hardware
for successfully completed commands, a la NCQ's SDB FIS.
Which opcodes are you using? I see set-acoustic-mgmt in one email...
Jeff
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