Scsi - Index of

然后是get_pipes().drivers/usb/storage/usb.c:
698 /* Get the pipe settings */
699 static int get_pipes(struct us_data *us)
700 {
701 struct usb_host_interface *altsetting =
702 us->pusb_intf->cur_altsetting;
703 int i;
704 struct usb_endpoint_descriptor *ep;
705 struct usb_endpoint_descriptor *ep_in = NULL;
706 struct usb_endpoint_descriptor *ep_out = NULL;
707 struct usb_endpoint_descriptor *ep_int = NULL;
708
709 /*
710 * Find the endpoints we need.
711 * We are expecting a minimum of 2 endpoints - in and out (bulk).
712 * An optional interrupt is OK (necessary for CBI protocol).
713 * We will ignore any others.
54
714 */
715 for (i = 0; i < altsetting->desc.bNumEndpoints; i++) {
716 ep = &altsetting->endpoint[i].desc;
717
718 /* Is it a BULK endpoint? */
719 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
720 == USB_ENDPOINT_XFER_BULK) {
721 /* BULK in or out? */
722 if (ep->bEndpointAddress & USB_DIR_IN)
723 ep_in = ep;
724 else
725 ep_out = ep;
726 }
727
728 /* Is it an interrupt endpoint? */
729 else if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
730 == USB_ENDPOINT_XFER_INT) {
731 ep_int = ep;
732 }
733 }
734
735 if (!ep_in || !ep_out || (us->protocol == US_PR_CBI && !ep_int)) {
736 US_DEBUGP("Endpoint sanity check failed! Rejecting dev.\n");
737 return -EIO;
738 }
739