usb_stream_config 342 sound/usb/usx2y/us122l.c struct usb_stream_config *cfg; usb_stream_config 22 sound/usb/usx2y/usb_stream.h _IOW('H', 0x90, struct usb_stream_config) usb_stream_config 38 sound/usb/usx2y/usb_stream.h struct usb_stream_config cfg;