prefer_subdevice 887 sound/core/pcm.c int prefer_subdevice; prefer_subdevice 901 sound/core/pcm.c prefer_subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_PCM); prefer_subdevice 914 sound/core/pcm.c if (prefer_subdevice < 0) { prefer_subdevice 921 sound/core/pcm.c if (substream->number == prefer_subdevice) prefer_subdevice 935 sound/core/pcm.c (prefer_subdevice == -1 || prefer_subdevice 936 sound/core/pcm.c substream->number == prefer_subdevice))