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6659 nvlist_free(NULL) is a no-op
*** 561,571 ****
  cleanup:
                  if (cfg)
                          it_config_free_cmn(cfg);
                  if (cfg_pnvlist)
                          kmem_free(cfg_pnvlist, setcfg.set_cfg_pnvlist_len);
-                 if (cfg_nvlist)
                          nvlist_free(cfg_nvlist);
  
                  /*
                   * Now that the reconfig is complete set our state back to
                   * enabled.
--- 561,570 ----