The member dev in struct pci_bus represents the kernel struct device representation of a PCI bus, inclusive of its NUMA node. When a PCI host bridge is registered, initialize the corresponding struct pci_bus.dev member NUMA node and add code in pci_alloc_child_bus() to propagate the NUMA node set-up through the PCI bus hierarchy (ie child nodes are in the same NUMA node as the parent). Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> --- drivers/pci/probe.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 19c8950..76c089f 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -770,6 +770,7 @@ int pci_register_host_bridge(struct pci_host_bridge *bridge) device_enable_async_suspend(bus->bridge); pci_set_bus_of_node(bus); pci_set_bus_msi_domain(bus); + set_dev_node(&bus->dev, pci_bus_find_numa_node(bus)); if (!parent) set_dev_node(bus->bridge, pcibus_to_node(bus)); @@ -861,7 +862,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, */ child->dev.class = &pcibus_class; dev_set_name(&child->dev, "%04x:%02x", pci_domain_nr(child), busnr); - + set_dev_node(&child->dev, dev_to_node(&parent->dev)); /* * Set up the primary, secondary and subordinate * bus numbers. -- 2.10.0
