PCI: designware: Use pci_scan_root_bus() for simplicity

After b97ea289cf6a ("PCI: Assign resources before drivers claim devices
(pci_scan_root_bus())"), pci_scan_root_bus() no longer adds the devices, so
it is equivalent to:

  pci_create_root_bus()
  pci_scan_child_bus()

Use pci_scan_root_bus() to simplify the code.

[bhelgaas: changelog]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Jingoo Han <jingoohan1@gmail.com>
CC: Mohit Kumar <mohit.kumar@st.com>

diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 2e9f84f..8c80f38 100644 (file)
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -728,13 +728,11 @@ static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
        struct pcie_port *pp = sys_to_pcie(sys);
 
        pp->root_bus_nr = sys->busnr;
-       bus = pci_create_root_bus(pp->dev, sys->busnr,
+       bus = pci_scan_root_bus(pp->dev, sys->busnr,
                                  &dw_pcie_ops, sys, &sys->resources);
        if (!bus)
                return NULL;
 
-       pci_scan_child_bus(bus);
-
        if (bus && pp->ops->scan_bus)
                pp->ops->scan_bus(pp);