if (intf->cur_altsetting->string) 
if (alt->string == NULL) alt->string = usb_cache_string(udev, alt->desc.iInterface); if (alt->string) 
void usb_create_sysfs_intf_files (struct usb_interface *intf){	sysfs_create_group(&intf->dev.kobj, &intf_attr_grp);	if (intf->cur_altsetting->string)		device_create_file(&intf->dev, &dev_attr_interface);	usb_create_intf_ep_files(intf);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/4f62efe67f077db17dad03a1d4c9665000a3eb45/sysfs.c/buggy/drivers/usb/core/sysfs.c