ahci: consider SDB FIS containing spurious NCQ completions HSM violation (regenerated)
SDB FIS containing spurious NCQ completions is a clear protocol violation. Currently, only some Maxtors with early firmware revisions are showing this problem. Those firmwares have other NCQ related problems including buggy NCQ error reporting and occasional lock up after NCQ errors. Consider spurious NCQ completions HSM violation and freeze the port after it. EH will turn off NCQ after this happens several times. Eventually drives which show this behavior should be blacklisted for NCQ. Signed-off-by: NTejun Heo <htejun@gmail.com> Signed-off-by: NJeff Garzik <jeff@garzik.org>
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