SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS 1546 sound/core/control.c case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS: SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS 446 sound/core/control_compat.c case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS: