usb_stream_prepare_playback 487 sound/usb/usx2y/usb_stream.c if (usb_stream_prepare_playback(sk, inurb) < 0) usb_stream_prepare_playback 583 sound/usb/usx2y/usb_stream.c if (usb_stream_prepare_playback(sk, inurb) < 0)