nau8825_sema_acquire
nau8825_sema_acquire(nau8825, 3 * HZ);
nau8825_sema_acquire(nau8825, 3 * HZ);
ret = nau8825_sema_acquire(nau8825, 0);
nau8825_sema_acquire(nau8825, 3 * HZ);
nau8825_sema_acquire(nau8825, 3 * HZ);
nau8825_sema_acquire(nau8825, 3 * HZ);
nau8825_sema_acquire(nau8825, 3 * HZ);
ret = nau8825_sema_acquire(nau8825, 0);