On Friday, January 18, 2013 10:35:46 AM Bjorn Helgaas wrote: > On Fri, Jan 18, 2013 at 9:07 AM, Jiang Liu <liuj97@xxxxxxxxx> wrote: > > If user specifies "pci=nopciehp" on kernel boot command line, OSPM > > won't claim PCIe native hotplug service from firmware and no PCIe > > port devices will be created for PCIe native hotplug service. > > Why do we need this option? > > If I understand correctly, there are machines where it *looks* like we > should use pciehp, but pciehp doesn't work because we don't get the > interrupts we expect. On those machines, we have to use acpiphp > instead. It seems like many Dell XPS laptops have this issue with > ExpressCard slots, e.g., > https://bugzilla.kernel.org/show_bug.cgi?id=40802 . > > If you want "pci=nopciehp" as a way for users to deal with this > problem by forcing the use of acpiphp, I object. Windows manages to > make these slots work without having users do anything special, so we > should be able to do it, too. And one can use pcie_ports=compat to work around these problems anyway. Thanks, Rafael -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- 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
