Re: [linux-pm] Re: The evilness of struct usb_device->auto_pm
Pavel Machek <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Thu 2007-10-04 12:05:38, Oliver Neukum wrote: > Am Montag 01 Oktober 2007 schrieb Pavel Machek: > > > > I guess that the SCSI layer is not really autosuspend-aware, is it? > > > > > > Not yet. I would like it to become autosuspend-aware. Oliver wants to > > > avoid that by keeping all the awareness in usb-storage. (But then what > > > about all the other SCSI host-adapter drivers? Will they each have > > > their own way of deciding when a SCSI device can be suspended?) > > > > I think I'd prefer to have autosuspending in SCSI layer. That way, we > > should be able to handle automatic disk spindowns nicely... > > OK, so this is the consensus. Then the question arises, how does a > driver learn that all it's children have gone into autosuspend? atomic_t variable in the parent, with children updating it and calling parent's callback when it goes to 1->0 and 0->1? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel