On Friday 04 September 2009, Matthew Garrett wrote: > On Fri, Sep 04, 2009 at 04:39:46PM +0200, Rafael J. Wysocki wrote: > > > Quite frankly, I'm not sure of that. It really depends on how PME# is routed > > in given system. The spec permits routing it directly to the chipset as well > > as routing it through bridges and I don't know if we can assume that the > > first upstream device capable of generating wake-up events will handle it. > > The GPE block is going to be in the chipset, so unless the vendors have > explicitly hooked up a link between the PME line from a bridge and the > EC, we're presumably always going to get it from the chipset if at all. > > > That said, I think we can try returning from > > acpi_pci_propagate_wakeup_enable() as soon as > > acpi_pm_device_sleep_wake() returns 0 for current device. On the test systems > > I have it won't make any difference, because the GPE is shared among the > > root bridge and the first upstream bridge of the device in question. > > Yes, it's presumably the case that the PME event in the bridge is just > tied to the root bridge in the chipset. Do we know what chipset this > hardware is? For Intel, at least, GPE behaviour is defined in the > chipset docs. One box is Intel, the other one is based on an ATI (pre-AMD) chipset, but the design is similar in that respect. Thanks, Rafael -- 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
