snd_usb_copy_string_desc
len = snd_usb_copy_string_desc(mixer->chip, nameid,
ret = snd_usb_copy_string_desc(state->chip, hdr->iClockSource,
len = snd_usb_copy_string_desc(state->chip,
len = snd_usb_copy_string_desc(state->chip,
len = snd_usb_copy_string_desc(chip, iterm->name,