ISOTP_SHUTDOWN
cmpxchg(&so->tx.state, ISOTP_IDLE, ISOTP_SHUTDOWN) != ISOTP_IDLE)
so->tx.state = ISOTP_SHUTDOWN;
if (so->tx.state == ISOTP_IDLE || so->tx.state == ISOTP_SHUTDOWN)
if (!so->bound || so->tx.state == ISOTP_SHUTDOWN)
if (so->tx.state == ISOTP_SHUTDOWN)