SNDRV_OSS_DEVICE_TYPE_SEQUENCER
rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);
if (snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0) < 0)
case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: