XHCI_ST_DISABLED
dev->dev_slotstate = XHCI_ST_DISABLED;
if (dev && dev->dev_slotstate == XHCI_ST_DISABLED) {
if (dev->dev_slotstate == XHCI_ST_DISABLED) {
dev->dev_slotstate = XHCI_ST_DISABLED;
if (!dev || dev->dev_slotstate == XHCI_ST_DISABLED)