On Monday, May 12, 2008 8:15 pm Zhao Yakui wrote: > Subject:PCI: Disable PME function of PCI device when scanning PCI device > > >From : Zhao Yakui <yakui.zhao@xxxxxxxxx> > > Maybe #PME is enabled for some PCI devices.And if the PME event can > be generated from D0 state, PME event will be generated when the PCI > device is in D0 state. If the device driver is not loaded for this PCI > device(PME can't be disabled) and the correspond GPE is enabled, the > system will be resumed immediately from the suspend state. This's not > what we wanted. > Thre is a similar case in ACPI system. If the ACPI device has the > _PRW object, the _PSW/_DSW object will be called in order to disable the > wakeup functionality. Only when it is allowed to wake up the sleeping > state, OSPM will enable it again. > > So it will be reasonable that PME is disabled in the course of > scanning PCI device and enabled again only when PME event is required to > be generated from the requested PCI state.(For example: D3_hot, > D3_cold). Of course it is also safe to disable PME again when the PME is > disabled for the PCI devices. Ok, thanks Yakui, I applied this to the linux-next branch (after cleaning up the changelog a little). Jesse -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
