PCI: aardvark: Convert PCI scan API to pci_scan_root_bus_bridge()

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 aardvark host code to pci_scan_root_bus_bridge() to improve the
PCI root bus scanning interface.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

diff --git a/drivers/pci/host/pci-aardvark.c b/drivers/pci/host/pci-aardvark.c
index 37d0bcd..5fb9b62 100644 (file)
--- a/drivers/pci/host/pci-aardvark.c
+++ b/drivers/pci/host/pci-aardvark.c
@@ -886,12 +886,14 @@ static int advk_pcie_probe(struct platform_device *pdev)
        struct advk_pcie *pcie;
        struct resource *res;
        struct pci_bus *bus, *child;
+       struct pci_host_bridge *bridge;
        int ret, irq;
 
-       pcie = devm_kzalloc(dev, sizeof(struct advk_pcie), GFP_KERNEL);
-       if (!pcie)
+       bridge = devm_pci_alloc_host_bridge(dev, sizeof(struct advk_pcie));
+       if (!bridge)
                return -ENOMEM;
 
+       pcie = pci_host_bridge_priv(bridge);
        pcie->pdev = pdev;
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -929,14 +931,21 @@ static int advk_pcie_probe(struct platform_device *pdev)
                return ret;
        }
 
-       bus = pci_scan_root_bus(dev, 0, &advk_pcie_ops,
-                               pcie, &pcie->resources);
-       if (!bus) {
+       list_splice_init(&pcie->resources, &bridge->windows);
+       bridge->dev.parent = dev;
+       bridge->sysdata = pcie;
+       bridge->busnr = 0;
+       bridge->ops = &advk_pcie_ops;
+
+       ret = pci_scan_root_bus_bridge(bridge);
+       if (ret < 0) {
                advk_pcie_remove_msi_irq_domain(pcie);
                advk_pcie_remove_irq_domain(pcie);
-               return -ENOMEM;
+               return ret;
        }
 
+       bus = bridge->bus;
+
        pci_bus_assign_resources(bus);
 
        list_for_each_entry(child, &bus->children, node)