CheckDebugTransfer
status_t error = bus->CheckDebugTransfer(transfer);
virtual status_t CheckDebugTransfer(Transfer *transfer);
virtual status_t CheckDebugTransfer(Transfer *transfer);
virtual status_t CheckDebugTransfer(Transfer *transfer);
while (CheckDebugTransfer(transfer) == B_DEV_PENDING)
virtual status_t CheckDebugTransfer(Transfer *transfer);