* [RFC]pass pm related information from ata to scsi
@ 2012-05-14 10:02 Aaron Lu
2012-05-14 14:20 ` Alan Stern
0 siblings, 1 reply; 2+ messages in thread
From: Aaron Lu @ 2012-05-14 10:02 UTC (permalink / raw)
To: Alan Stern, Rafael J. Wysocki
Cc: linux pm mailing list, linux scsi mailing list,
linux ide mailing list, Lin Ming
Hi,
ATA ODD has a new feature called device attention, which means it can
notify sata host that it needs power when in powered off state.
In libata, we can set a flag(ATA_DFLAG_DA) to represent this when
identifying the ata device. And when we are going to create the scsi
device(in ata_scsi_scan_host by __scsi_add_device), I hope the scsi
driver(sr) knows that this ODD supports device attention in its probe
function(sr_probe).
I didn't find a proper way to do this, any suggestions?
Thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [RFC]pass pm related information from ata to scsi
2012-05-14 10:02 [RFC]pass pm related information from ata to scsi Aaron Lu
@ 2012-05-14 14:20 ` Alan Stern
0 siblings, 0 replies; 2+ messages in thread
From: Alan Stern @ 2012-05-14 14:20 UTC (permalink / raw)
To: Aaron Lu
Cc: Rafael J. Wysocki, linux pm mailing list, linux scsi mailing list,
linux ide mailing list, Lin Ming
On Mon, 14 May 2012, Aaron Lu wrote:
> Hi,
>
> ATA ODD has a new feature called device attention, which means it can
> notify sata host that it needs power when in powered off state.
>
> In libata, we can set a flag(ATA_DFLAG_DA) to represent this when
> identifying the ata device. And when we are going to create the scsi
> device(in ata_scsi_scan_host by __scsi_add_device), I hope the scsi
> driver(sr) knows that this ODD supports device attention in its probe
> function(sr_probe).
>
> I didn't find a proper way to do this, any suggestions?
Add a corresponding flag to the scsi_cd structure, and set the flag in
libata's slave_configure routine.
Alan Stern
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2012-05-14 14:20 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-05-14 10:02 [RFC]pass pm related information from ata to scsi Aaron Lu
2012-05-14 14:20 ` Alan Stern
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.