Caution with use after exi_rele()

@@ -533,10 +533,11 @@
          */
         if (PUBLIC_FH2(fhp)) {
                 publicfh_flag = TRUE;
 
                 exi_rele(exi);
+                exi = NULL;
 
                 error = rfs_publicfh_mclookup(name, dvp, cr, &vp, &exi,
                     &sec);
         } else {
                 /*