xhci_erst_entry
struct xhci_erst_entry *entry;
size = array_size(sizeof(struct xhci_erst_entry), evt_ring->num_segs);
erst_size = array_size(sizeof(struct xhci_erst_entry), ir->erst.num_entries);
BUILD_BUG_ON(sizeof(struct xhci_erst_entry) != 4*32/8);
struct xhci_erst_entry *entries;