PCI: Simplify pci_create_attr() control flow

Return error immediately to simplify the control flow in pci_create_attr().
No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/pci-sysfs.c

@@ -1134,11 +1134,14 @@ static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
 	/* allocate attribute structure, piggyback attribute name */
 	int name_len = write_combine ? 13 : 10;
 	struct bin_attribute *res_attr;
+	char *res_attr_name;
 	int retval;
 
 	res_attr = kzalloc(sizeof(*res_attr) + name_len, GFP_ATOMIC);
-	if (res_attr) {
-		char *res_attr_name = (char *)(res_attr + 1);
+	if (!res_attr)
+		return -ENOMEM;
+
+	res_attr_name = (char *)(res_attr + 1);
 
 	sysfs_bin_attr_init(res_attr);
 	if (write_combine) {
@@ -1161,8 +1164,6 @@ static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
 	retval = sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
 	if (retval)
 		kfree(res_attr);
-	} else
-		retval = -ENOMEM;
 
 	return retval;
 }