710     struct usb_request *req = calloc(1, sizeof(struct usb_request));  in usb_request_new()  local
711     if (!req) {  in usb_request_new()
716     req->dev = dev;  in usb_request_new()
717     req->max_packet_size = __le16_to_cpu(ep_desc->wMaxPacketSize);  in usb_request_new()
718     req->private_data = urb;  in usb_request_new()
719     req->endpoint = urb->endpoint;  in usb_request_new()
720     urb->usercontext = req;  in usb_request_new()
722     return req;  in usb_request_new()
725 void usb_request_free(struct usb_request *req)  in usb_request_free()  argument
727     free(req->private_data);  in usb_request_free()
728     free(req);  in usb_request_free()
731 int usb_request_queue(struct usb_request *req)  in usb_request_queue()  argument
733     struct usbdevfs_urb *urb = (struct usbdevfs_urb*)req->private_data;  in usb_request_queue()
737     urb->buffer = req->buffer;  in usb_request_queue()
738     urb->buffer_length = req->buffer_length;  in usb_request_queue()
741         res = ioctl(req->dev->fd, USBDEVFS_SUBMITURB, urb);  in usb_request_queue()
774         struct usb_request *req = (struct usb_request*)urb->usercontext;  in usb_request_wait()  local
775         req->actual_length = urb->actual_length;  in usb_request_wait()
777         return req;  in usb_request_wait()
781 int usb_request_cancel(struct usb_request *req)  in usb_request_cancel()  argument
783     struct usbdevfs_urb *urb = ((struct usbdevfs_urb*)req->private_data);  in usb_request_cancel()
784     return ioctl(req->dev->fd, USBDEVFS_DISCARDURB, urb);  in usb_request_cancel()