From 314a1408b79a844dafdcde867d90de5d509409b7 Mon Sep 17 00:00:00 2001 From: Vincent Whitchurch Date: Fri, 20 Jan 2023 09:02:32 +0100 Subject: [PATCH] um: virt-pci: implement pcibios_get_phb_of_node() Implement pcibios_get_phb_of_node() as x86 does in order to allow PCI busses to be associated with devicetree nodes. Signed-off-by: Vincent Whitchurch Acked-by: Johannes Berg Signed-off-by: Richard Weinberger --- arch/um/drivers/virt-pci.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/um/drivers/virt-pci.c b/arch/um/drivers/virt-pci.c index 3ac220d..6884e1b 100644 --- a/arch/um/drivers/virt-pci.c +++ b/arch/um/drivers/virt-pci.c @@ -533,6 +533,25 @@ static void um_pci_irq_vq_cb(struct virtqueue *vq) } } +/* Copied from arch/x86/kernel/devicetree.c */ +struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) +{ + struct device_node *np; + + for_each_node_by_type(np, "pci") { + const void *prop; + unsigned int bus_min; + + prop = of_get_property(np, "bus-range", NULL); + if (!prop) + continue; + bus_min = be32_to_cpup(prop); + if (bus->number == bus_min) + return np; + } + return NULL; +} + static int um_pci_init_vqs(struct um_pci_device *dev) { struct virtqueue *vqs[2]; -- 2.7.4