704     struct usb_request *req = calloc(1, sizeof(struct usb_request));  in usb_request_new()  local
705     if (!req) {  in usb_request_new()
710     req->dev = dev;  in usb_request_new()
711     req->max_packet_size = __le16_to_cpu(ep_desc->wMaxPacketSize);  in usb_request_new()
712     req->private_data = urb;  in usb_request_new()
713     req->endpoint = urb->endpoint;  in usb_request_new()
714     urb->usercontext = req;  in usb_request_new()
716     return req;  in usb_request_new()
719 void usb_request_free(struct usb_request *req)  in usb_request_free()  argument
721     free(req->private_data);  in usb_request_free()
722     free(req);  in usb_request_free()
725 int usb_request_queue(struct usb_request *req)  in usb_request_queue()  argument
727     struct usbdevfs_urb *urb = (struct usbdevfs_urb*)req->private_data;  in usb_request_queue()
731     urb->buffer = req->buffer;  in usb_request_queue()
732     urb->buffer_length = req->buffer_length;  in usb_request_queue()
735         res = ioctl(req->dev->fd, USBDEVFS_SUBMITURB, urb);  in usb_request_queue()
768         struct usb_request *req = (struct usb_request*)urb->usercontext;  in usb_request_wait()  local
769         req->actual_length = urb->actual_length;  in usb_request_wait()
771         return req;  in usb_request_wait()
775 int usb_request_cancel(struct usb_request *req)  in usb_request_cancel()  argument
777     struct usbdevfs_urb *urb = ((struct usbdevfs_urb*)req->private_data);  in usb_request_cancel()
778     return ioctl(req->dev->fd, USBDEVFS_DISCARDURB, urb);  in usb_request_cancel()