Damien Le Moal <dlemoal@xxxxxxxxxx> writes: > I suspect you are talking about resume from hybernation here, where the drive > may have been completely powered off... Yes, in such case, the drive will > spinup, unless you have PUIS and enabled it. The same thing happens in suspend / S3. > Sure, but please do not have this delay this patch series. The problem you are > describing above exists today already. This patch series is not making it worse, > nor is it trying to solve it. And note that this issue is not just for ATA. SCSI > devices locally attached to a machine that you hybernate will end up doing the > same and spinup when power is restored... You are saying that right now, the sd driver issues a START UNIT command on system resume ( it looks like there's a flag you can set now to prevent that ), then leaves the runtime pm state looking like the drive is still suspended? I thought it handled that correctly but I don't see any code doing so right now. If that's the case, then I suppose this series at least does not make things worse...
