638     struct usb_request *req = calloc(1, sizeof(struct usb_request));  in usb_request_new()  local
639     if (!req) {  in usb_request_new()
644     req->dev = dev;  in usb_request_new()
645     req->max_packet_size = __le16_to_cpu(ep_desc->wMaxPacketSize);  in usb_request_new()
646     req->private_data = urb;  in usb_request_new()
647     req->endpoint = urb->endpoint;  in usb_request_new()
648     urb->usercontext = req;  in usb_request_new()
650     return req;  in usb_request_new()
653 void usb_request_free(struct usb_request *req)  in usb_request_free()  argument
655     free(req->private_data);  in usb_request_free()
656     free(req);  in usb_request_free()
659 int usb_request_queue(struct usb_request *req)  in usb_request_queue()  argument
661     struct usbdevfs_urb *urb = (struct usbdevfs_urb*)req->private_data;  in usb_request_queue()
665     urb->buffer = req->buffer;  in usb_request_queue()
667     if (req->buffer_length > MAX_USBFS_BUFFER_SIZE)  in usb_request_queue()
670         urb->buffer_length = req->buffer_length;  in usb_request_queue()
673         res = ioctl(req->dev->fd, USBDEVFS_SUBMITURB, urb);  in usb_request_queue()
682     struct usb_request *req = NULL;  in usb_request_wait()  local
696             req = (struct usb_request*)urb->usercontext;  in usb_request_wait()
697             req->actual_length = urb->actual_length;  in usb_request_wait()
701     return req;  in usb_request_wait()
704 int usb_request_cancel(struct usb_request *req)  in usb_request_cancel()  argument
706     struct usbdevfs_urb *urb = ((struct usbdevfs_urb*)req->private_data);  in usb_request_cancel()
707     return ioctl(req->dev->fd, USBDEVFS_DISCARDURB, urb);  in usb_request_cancel()