On Mon, Feb 27, 2012 at 2:24 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote: >> >> for every bus will have ->bridge, and that is device pointer. to pci >> bridge dev. >> >> for root bus, there is not pci bridge for that. So create_root_bus >> allocate local dummy one. >> >> that dummy device will be bus->dev's parent. >> >> Now pci_host_bridge is added, and it is allocated, so just put the >> struct device into that pci_host_bridge. >> >> and use pci_host_bridge->dev as parent of root bus->dev's parent. > > What's the device passed in to pci_create_root_bus()? Why is that > different than the root bus dev's parent? ia64 and x86 doesn't pass that. arch/ia64/pci/pci.c: pbus = pci_create_root_bus(NULL, bus, &pci_root_ops, controller, arch/powerpc/kernel/pci-common.c: bus = pci_create_root_bus(hose->parent, hose->first_busno, arch/sparc/kernel/pci.c: bus = pci_create_root_bus(parent, pbm->pci_first_busno, pbm->pci_ops, arch/x86/pci/acpi.c: bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd, drivers/parisc/dino.c: dino_dev->hba.hba_bus = bus = pci_create_root_bus(&dev->dev, drivers/parisc/lba_pci.c: pci_create_root_bus(&dev->dev, lba_dev->hba.bus_num.start, sparc, powerpc, parisc have their local ... so local hose etc's dev ---> allocated dev ---> root bus's dev this patch change to local hose etc's dev ---> allocated host bridge's dev ---> root bus's dev -- 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
