usb_audio_extension_unit_1 1274 dev/usb/uaudio.c const struct usb_audio_extension_unit_1 *d1 = usb_audio_extension_unit_1 1275 dev/usb/uaudio.c (const struct usb_audio_extension_unit_1 *)&d->baSourceId[d->bNrInPins]; usb_audio_extension_unit_1 241 dev/usb/uaudioreg.h struct usb_audio_extension_unit_1 {