rio_cm_state
enum rio_cm_state state;
enum rio_cm_state state;
static int riocm_cmp(struct rio_channel *ch, enum rio_cm_state cmp)
enum rio_cm_state cmp, enum rio_cm_state exch)
static enum rio_cm_state riocm_exch(struct rio_channel *ch,
enum rio_cm_state exch)
enum rio_cm_state old;