MBOX_MAX_USER_CMDS
adapter->uscb_list = kzalloc_objs(scb_t, MBOX_MAX_USER_CMDS);
for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
adp.max_kioc = MBOX_MAX_USER_CMDS;
mbox_ccb_t uccb_list[MBOX_MAX_USER_CMDS];
mbox64_t umbox64[MBOX_MAX_USER_CMDS];