PCI: rockchip: Fix rockchip_pcie_probe() error path to free resource list

rockchip_pcie_probe() calls of_pci_get_host_bridge_resources() to parse
resources from DT and build a resource list.  The caller is responsible for
disposing of the resource list.  This is normally done by
pci_release_host_bridge_dev() when the host bridge is removed.

If the host bridge probe fails, dispose of the resource list in the probe
error path.

[bhelgaas: changelog]
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/host/pcie-rockchip.c

@@ -1343,7 +1343,7 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
 
 	err = devm_request_pci_bus_resources(dev, &res);
 	if (err)
-		goto err_vpcie;
+		goto err_free_res;
 
 	/* Get the I/O and memory ranges from DT */
 	resource_list_for_each_entry(win, &res) {
@@ -1376,19 +1376,19 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
 
 	err = rockchip_cfg_atu(rockchip);
 	if (err)
-		goto err_vpcie;
+		goto err_free_res;
 
 	rockchip->msg_region = devm_ioremap(rockchip->dev,
 					    rockchip->msg_bus_addr, SZ_1M);
 	if (!rockchip->msg_region) {
 		err = -ENOMEM;
-		goto err_vpcie;
+		goto err_free_res;
 	}
 
 	bus = pci_scan_root_bus(&pdev->dev, 0, &rockchip_pcie_ops, rockchip, &res);
 	if (!bus) {
 		err = -ENOMEM;
-		goto err_vpcie;
+		goto err_free_res;
 	}
 
 	pci_bus_size_bridges(bus);
@@ -1399,6 +1399,8 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
 	pci_bus_add_devices(bus);
 	return err;
 
+err_free_res:
+	pci_free_resource_list(&res);
 err_vpcie:
 	if (!IS_ERR(rockchip->vpcie3v3))
 		regulator_disable(rockchip->vpcie3v3);