- /*
- * Now we need to find out what the last successful toggle was
- * so we can update the local data toggle for the next transfer
- *
- * There are 2 ways the last successful completed TD is found:
- *
- * 1) The TD is NOT active and the actual length < expected length
- * 2) The TD is NOT active and it's the last TD in the chain
- *
- * and a third way the first uncompleted TD is found:
- *
- * 3) The TD is active and the previous TD is NOT active
- *
- * Control and Isochronous ignore the toggle, so this is safe
- * for all types
- *
- * FIXME: The toggle fixups won't be 100% reliable until we
- * change over to using a single queue for each endpoint and
- * stop the queue before unlinking.
- */
- head = &urbp->td_list;
- list_for_each_entry(td, head, list) {
- unsigned int ctrlstat = td_status(td);
-
- if (!(ctrlstat & TD_CTRL_ACTIVE) &&
- (uhci_actual_length(ctrlstat) <
- uhci_expected_length(td_token(td)) ||
- td->list.next == head))
- usb_settoggle(urb->dev, uhci_endpoint(td_token(td)),
- uhci_packetout(td_token(td)),
- uhci_toggle(td_token(td)) ^ 1);
- else if ((ctrlstat & TD_CTRL_ACTIVE) && !prevactive)
- usb_settoggle(urb->dev, uhci_endpoint(td_token(td)),
- uhci_packetout(td_token(td)),
- uhci_toggle(td_token(td)));
-
- prevactive = ctrlstat & TD_CTRL_ACTIVE;