From: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Date: Tue, 11 Nov 2008 17:04:40 +1100 > Any reason why we don't create the legacy_io/mem files for child > busses ? > > The fact that they only exist for PHBs makes it tricky for userspace > programs to find them > > Since they only appear in /sys/class/pci_bus/* which has no hierarchy > information, a user space program like in my case that gets passed a > sysfs path to a device, would have to walk back up the chain to find out > the phb in order to then find it in there. > > I don't see why we can't call pci_create_legacy_files() in > pci_alloc_child_bus() too though. Any reason ? Actually this is a bug on systems where the host controller root bus doesn't even exist, as happens on several sparc64 systems. Only the hierarchy under the host-controller exists in the Linux data structures. -- 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
