USB_PROC_UPDOWN 1265 sound/usb/usbmixer.c { USB_PROC_UPDOWN, "Up Down", updown_proc_info }, USB_PROC_UPDOWN 1328 sound/usb/usbmixer.c if (type == USB_PROC_UPDOWN && cval->control == USB_PROC_UPDOWN_MODE_SEL) {