int len;
struct usb_host_interface *alt;
static ssize_t show_modalias(struct device *dev, struct device_attribute *attr, char *buf){	struct usb_interface *intf;	struct usb_device *udev;	int len;	intf = to_usb_interface(dev);	udev = interface_to_usbdev(intf);	len = sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic",			       le16_to_cpu(udev->descriptor.idVendor),			       le16_to_cpu(udev->descriptor.idProduct),			       le16_to_cpu(udev->descriptor.bcdDevice),			       udev->descriptor.bDeviceClass,			       udev->descriptor.bDeviceSubClass,			       udev->descriptor.bDeviceProtocol);	buf += len;	if (udev->descriptor.bDeviceClass == 0) {		struct usb_host_interface *alt = intf->cur_altsetting;		return len + sprintf(buf, "%02Xisc%02Xip%02X\n",			       alt->desc.bInterfaceClass,			       alt->desc.bInterfaceSubClass,			       alt->desc.bInterfaceProtocol); 	} else {		return len + sprintf(buf, "*isc*ip*\n");	}}