ALSA_CAPTURE_RUNNING
if (frames > 0 && test_bit(ALSA_CAPTURE_RUNNING, &ua->states))
if (test_bit(ALSA_CAPTURE_RUNNING, &ua->states))
set_bit(ALSA_CAPTURE_RUNNING, &ua->states);
clear_bit(ALSA_CAPTURE_RUNNING, &ua->states);