usb: core: Change usb_create_sysfs_intf_files()' return type to void

The usb_create_sysfs_intf_files() function always returned zero even
if it failed to create sysfs fails. Since this is a desired behaviour
there is no need to return return code at all. This commit changes
function's return type (form int) to void.

Signed-off-by: Michal Nazarewicz <[e-mail]>
Cc: Sergey Senozhatsky <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/core/sysfs.c

···
 	NULL
 };
 
-int usb_create_sysfs_intf_files(struct usb_interface *intf)
+void usb_create_sysfs_intf_files(struct usb_interface *intf)
 {
 	struct usb_device *udev = interface_to_usbdev(intf);
 	struct usb_host_interface *alt = intf->cur_altsetting;
-	int retval;
 
 	if (intf->sysfs_files_created || intf->unregistering)
-		return 0;
+		return;
 
-	if (alt->string == NULL &&
-			!(udev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS))
+	if (!alt->string && !(udev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS))
 		alt->string = usb_cache_string(udev, alt->desc.iInterface);
-	if (alt->string)
-		retval = device_create_file(&intf->dev, &dev_attr_interface);
+	if (alt->string && device_create_file(&intf->dev, &dev_attr_interface))
+		;	/* We don't actually care if the function fails. */
 	intf->sysfs_files_created = 1;
-	return 0;
 }
 
 void usb_remove_sysfs_intf_files(struct usb_interface *intf)

drivers/usb/core/usb.c

···
 		if (dev->type == &usb_device_type)
 			(void) usb_create_sysfs_dev_files(to_usb_device(dev));
 		else if (dev->type == &usb_if_device_type)
-			(void) usb_create_sysfs_intf_files(
-					to_usb_interface(dev));
+			usb_create_sysfs_intf_files(to_usb_interface(dev));
 		break;
 
 	case BUS_NOTIFY_DEL_DEVICE:

drivers/usb/core/usb.h

···
 
 extern int usb_create_sysfs_dev_files(struct usb_device *dev);
 extern void usb_remove_sysfs_dev_files(struct usb_device *dev);
-extern int usb_create_sysfs_intf_files(struct usb_interface *intf);
+extern void usb_create_sysfs_intf_files(struct usb_interface *intf);
 extern void usb_remove_sysfs_intf_files(struct usb_interface *intf);
 extern int usb_create_ep_devs(struct device *parent,
 				struct usb_host_endpoint *endpoint,