IVTV_F_S_NEEDS_DATA
if (test_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags)) {
clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags);
set_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags);
clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags);
clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags);