FRAG_DISABLED
priv->frag_threshold = DEFAULT_FTS | FRAG_DISABLED;
priv->frag_threshold |= FRAG_DISABLED;
wrqu->frag.value = priv->frag_threshold & ~FRAG_DISABLED;
wrqu->frag.disabled = (priv->frag_threshold & FRAG_DISABLED) ? 1 : 0;