snd_ad1816a_pcm 161 include/sound/ad1816a.h extern int snd_ad1816a_pcm(struct snd_ad1816a *chip, int device); snd_ad1816a_pcm 162 sound/isa/ad1816a/ad1816a.c if ((error = snd_ad1816a_pcm(chip, 0)) < 0) {