snd_usb_pcm_prepare 1802 sound/usb/pcm.c .prepare = snd_usb_pcm_prepare, snd_usb_pcm_prepare 1814 sound/usb/pcm.c .prepare = snd_usb_pcm_prepare, snd_usb_pcm_prepare 1826 sound/usb/pcm.c .prepare = snd_usb_pcm_prepare, snd_usb_pcm_prepare 1838 sound/usb/pcm.c .prepare = snd_usb_pcm_prepare,