u_audio_stop_playback
u_audio_stop_playback(&uac1->g_audio);
u_audio_stop_playback(&uac1->g_audio);
u_audio_stop_playback(&uac2->g_audio);
u_audio_stop_playback(&uac2->g_audio);
EXPORT_SYMBOL_GPL(u_audio_stop_playback);
void u_audio_stop_playback(struct g_audio *g_audio);