PCM_REAR_CHANNEL 512 sound/pci/ca0106/ca0106_main.c case PCM_REAR_CHANNEL: PCM_REAR_CHANNEL 635 sound/pci/ca0106/ca0106_main.c return snd_ca0106_pcm_open_playback_channel(substream, PCM_REAR_CHANNEL); PCM_REAR_CHANNEL 675 sound/pci/ca0106/ca0106_mixer.c case PCM_REAR_CHANNEL: