On Tue, Jun 01, 2010 at 10:59:17AM -0400, Alan Stern wrote: > Can we rely on the forbid/allow mechanism? If userspace never allows > runtime suspend for devices like the video controller then there's no > problem. Conversely, if a PCI device really doesn't have a driver and > isn't used for anything, then by default it should go into a lower > power state if userspace allows this. I think that's safe, yes. Other fringe concerns include things like smbus controllers - we typically won't allow a driver to bind to them because they're used by ACPI, so putting the in D3 is also an error. So I think Rafael's right in that we should default to forbid unless a driver knows that it's safe, and let userspace override us. -- Matthew Garrett | mjg59@xxxxxxxxxxxxx _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
