AC97_EI_REV_MASK
return (ac97->ext_id & AC97_EI_REV_MASK) >= AC97_EI_REV_22;
(ac97->ext_id & AC97_EI_REV_MASK) >= AC97_EI_REV_23 &&
ac97->ext_id = (ac97->ext_id & ~AC97_EI_REV_MASK) | AC97_EI_REV_23;
if ((ac97->ext_id & AC97_EI_REV_MASK) >= AC97_EI_REV_23) {
(ext & AC97_EI_REV_MASK) >> AC97_EI_REV_SHIFT,
if ((ac97->ext_id & AC97_EI_REV_MASK) >= AC97_EI_REV_23) {