On Sat, Mar 15, 2014 at 03:15:04PM +0100, Rafael J. Wysocki wrote: > I've just gone throught this. Thanks. > So the problem is that we have the PNP "system" driver whose only purpose seems > to be to reserve system resources so that the PCI layer doesn't assign them to > new devices on hotplug (disclaimer: I didn't invent it, I only read the code and > comments in there). > > It does that for ACPI device objects having the "PNP0C02" and "PNP0C01" IDs. Right, pnp 00:01 is PNP0C02. > Apparently, snb_uncore_imc_init_box() steps on a range already reserved by that > driver on your box. And this doesn't seem to be a coincidence, because the ACPI > device object in question probably *does* correspond to the memory controller > that the uncore driver attempts to use. > > I'm not sure how to address that right now to be honest. Arguably, the PNP > "system" driver should be replaced with something saner, but still the > resources it claims need to be kept out of reach of the PCI's resource > allocation code. Well, I'm only conjecturing here but there should be a way for the uncore code to tell the PNP "system" driver to free this resource because uncore is going to use it now. Or something to that effect. Oh well. -- 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
