Damien Le Moal <dlemoal@xxxxxxxxxx> writes: > Yes, but only for drives that report full identify data when PUIS is enabled. > For drives that report incomplete identify data, we have no choice but to wake > them up. And yes, we need integration with runtime pm to set the > initial power Why was that again? I think you said something about needing to set the speed correctly so you at least need to know if this drive requires a lower speed than the other in the PATA master/slave pair? Wouldn't that only require the speed information, not all identify data? > state of the drive to standby (instead of "on") for both the ata device and its > scsi device. You mean if the whole device hierarchy were changed so that instead of the scsi_host being a child of the port with the links and devices hanging off to the side, the scsi_host would be the child of the ata device? > I need to check that. I think there may be a better/easier way to get the > current power state of a drive. Will get back to you on that. That would be good. At one point that was the way I found, and also I think it was in the SAT-3 spec that is how REQUEST SENSE should be implemented for ATA disks.
