PCI: versatile: Check for devm_ioremap_resource() failures

Check for failure of devm_ioremap_resource().

devm_ioremap_resource() validates the resource it receives, so if we check
for devm_ioremap_resource() failure, we need not check for failure of the
preceding platform_get_resource().

[bhelgaas: changelog]
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/host/pci-versatile.c

@@ -138,19 +138,19 @@ static int versatile_pci_probe(struct platform_device *pdev)
 	LIST_HEAD(pci_res);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENODEV;
 	versatile_pci_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(versatile_pci_base))
+		return PTR_ERR(versatile_pci_base);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	if (!res)
-		return -ENODEV;
 	versatile_cfg_base[0] = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(versatile_cfg_base[0]))
+		return PTR_ERR(versatile_cfg_base[0]);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
-	if (!res)
-		return -ENODEV;
 	versatile_cfg_base[1] = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(versatile_cfg_base[1]))
+		return PTR_ERR(versatile_cfg_base[1]);
 
 	ret = versatile_pci_parse_request_of_pci_ranges(&pdev->dev, &pci_res);
 	if (ret)