PVS-Studio warning V612 for OpenDDS

void Socket_Impl::
  send_ (void const* buf, size_t s)
{
  ....
  while (queue_.is_empty ())
  {
    if (timeout)
    {
      if (cond_.wait (&abs_time) != -1)
        break;
    }
    else
    {
      if (cond_.wait () != -1)
        break;
    }

    return -1; // errno is already set
  }
  ....
}

This suspicious code was found in OpenDDS project by PVS-Studio static code analyzer.
Warning message is:
V612 An unconditional 'return' within a loop. socket.cpp 187

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/