@@ -117,8 +117,14 @@ int pci_host_common_probe(struct platform_device *pdev,
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct pci_bus *bus, *child;
+ struct pci_host_bridge *bridge;
struct pci_config_window *cfg;
struct list_head resources;
+ int ret;
+
+ bridge = devm_pci_alloc_host_bridge(dev, 0);
+ if (!bridge)
+ return -ENOMEM;
type = of_get_property(np, "device_type", NULL);
if (!type || strcmp(type, "pci")) {
@@ -138,13 +144,20 @@ int pci_host_common_probe(struct platform_device *pdev,
if (!pci_has_flag(PCI_PROBE_ONLY))
pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS);
- bus = pci_scan_root_bus(dev, cfg->busr.start, &ops->pci_ops, cfg,
- &resources);
- if (!bus) {
- dev_err(dev, "Scanning rootbus failed");
- return -ENODEV;
+ list_splice_init(&resources, &bridge->windows);
+ bridge->dev.parent = dev;
+ bridge->sysdata = cfg;
+ bridge->busnr = cfg->busr.start;
+ bridge->ops = &ops->pci_ops;
+
+ ret = pci_scan_root_bus_bridge(bridge);
+ if (ret < 0) {
+ dev_err(dev, "Scanning root bridge failed");
+ return ret;
}
+ bus = bridge->bus;
+
#ifdef CONFIG_ARM
pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
#endif
The introduction of pci_scan_root_bus_bridge() provides a PCI core API to scan a PCI root bus backed by an already initialized struct pci_host_bridge object, which simplifies the bus scan interface and makes the PCI scan root bus interface easier to generalize as members are added to the struct pci_host_bridge. Convert PCI host-common code to pci_scan_root_bus_bridge() to improve the PCI root bus scanning interface. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Bjorn Helgaas <bhelgaas@google.com> --- drivers/pci/host/pci-host-common.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-)