SERR_DEV_XCHG
hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG;
ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : "");
if (serror & (SERR_DEV_XCHG | SERR_PHYRDY_CHG)) {