diff --git a/bin/check/check-tool.c b/bin/check/check-tool.c
index 4c89a7b60a..c88adb8550 100644
--- a/bin/check/check-tool.c
+++ b/bin/check/check-tool.c
@@ -664,7 +664,7 @@ load_zone(isc_mem_t *mctx, const char *zonename, const char *filename,
 	origin = dns_fixedname_initname(&fixorigin);
 	CHECK(dns_name_fromtext(origin, &buffer, dns_rootname, 0, NULL));
 	CHECK(dns_zone_setorigin(zone, origin));
-	CHECK(dns_zone_setdbtype(zone, 1, (const char * const *) dbtype));
+	dns_zone_setdbtype(zone, 1, (const char * const *) dbtype);
 	CHECK(dns_zone_setfile(zone, filename, fileformat,
 			       &dns_master_style_default));
 	if (journal != NULL)
diff --git a/bin/named/controlconf.c b/bin/named/controlconf.c
index efb34e5206..1560879bf3 100644
--- a/bin/named/controlconf.c
+++ b/bin/named/controlconf.c
@@ -706,7 +706,7 @@ cfgkeylist_find(const cfg_obj_t *keylist, const char *keyname,
 	return (ISC_R_SUCCESS);
 }
 
-static isc_result_t
+static void
 controlkeylist_fromcfg(const cfg_obj_t *keylist, isc_mem_t *mctx,
 		       controlkeylist_t *keyids)
 {
@@ -732,7 +732,6 @@ controlkeylist_fromcfg(const cfg_obj_t *keylist, isc_mem_t *mctx,
 		ISC_LIST_APPEND(*keyids, key, link);
 		newstr = NULL;
 	}
-	return (ISC_R_SUCCESS);
 }
 
 static void
@@ -986,14 +985,11 @@ update_listener(named_controls_t *cp, controllistener_t **listenerp,
 		INSIST(global_keylist != NULL);
 
 		ISC_LIST_INIT(keys);
-		result = controlkeylist_fromcfg(control_keylist,
-						listener->mctx, &keys);
-		if (result == ISC_R_SUCCESS) {
-			free_controlkeylist(&listener->keys, listener->mctx);
-			listener->keys = keys;
-			register_keys(control, global_keylist, &listener->keys,
-				      listener->mctx, socktext);
-		}
+		controlkeylist_fromcfg(control_keylist, listener->mctx, &keys);
+		free_controlkeylist(&listener->keys, listener->mctx);
+		listener->keys = keys;
+		register_keys(control, global_keylist, &listener->keys,
+			      listener->mctx, socktext);
 	} else {
 		free_controlkeylist(&listener->keys, listener->mctx);
 		result = get_rndckey(listener->mctx, &listener->keys);
@@ -1144,15 +1140,13 @@ add_listener(named_controls_t *cp, controllistener_t **listenerp,
 				     &control_keylist);
 
 		if (control_keylist != NULL) {
-			result = controlkeylist_fromcfg(control_keylist,
-							listener->mctx,
+			controlkeylist_fromcfg(control_keylist, listener->mctx,
 							&listener->keys);
-			if (result == ISC_R_SUCCESS)
-				register_keys(control, global_keylist,
-					      &listener->keys,
-					      listener->mctx, socktext);
-		} else
+			register_keys(control, global_keylist, &listener->keys,
+				      listener->mctx, socktext);
+		} else {
 			result = get_rndckey(mctx, &listener->keys);
+		}
 
 		if (result != ISC_R_SUCCESS && control != NULL)
 			cfg_obj_log(control, named_g_lctx, ISC_LOG_WARNING,
diff --git a/bin/named/server.c b/bin/named/server.c
index b21325fb97..ea187d50ad 100644
--- a/bin/named/server.c
+++ b/bin/named/server.c
@@ -1904,7 +1904,7 @@ dns64_reverse(dns_view_t *view, isc_mem_t *mctx, isc_netaddr_t *na,
 	dns_zone_setclass(zone, view->rdclass);
 	dns_zone_settype(zone, dns_zone_master);
 	dns_zone_setstats(zone, named_g_server->zonestats);
-	CHECK(dns_zone_setdbtype(zone, dns64_dbtypec, dns64_dbtype));
+	dns_zone_setdbtype(zone, dns64_dbtypec, dns64_dbtype);
 	if (view->queryacl != NULL)
 		dns_zone_setqueryacl(zone, view->queryacl);
 	if (view->queryonacl != NULL)
@@ -3410,9 +3410,9 @@ create_empty_zone(dns_zone_t *zone, dns_name_t *name, dns_view_t *view,
 		zone = myzone;
 		CHECK(dns_zone_setorigin(zone, name));
 		CHECK(dns_zonemgr_managezone(named_g_server->zonemgr, zone));
-		if (db == NULL)
-			CHECK(dns_zone_setdbtype(zone, empty_dbtypec,
-						 empty_dbtype));
+		if (db == NULL) {
+			dns_zone_setdbtype(zone, empty_dbtypec, empty_dbtype);
+		}
 		dns_zone_setclass(zone, view->rdclass);
 		dns_zone_settype(zone, dns_zone_master);
 		dns_zone_setstats(zone, named_g_server->zonestats);
diff --git a/bin/named/zoneconf.c b/bin/named/zoneconf.c
index 07dffc77b1..a1abd359a9 100644
--- a/bin/named/zoneconf.c
+++ b/bin/named/zoneconf.c
@@ -977,12 +977,11 @@ named_zone_configure(const cfg_obj_t *config, const cfg_obj_t *vconfig,
 	 * cannot be promoted automatically to (const char * const *) by the
 	 * compiler w/o generating a warning.
 	 */
-	result = dns_zone_setdbtype(zone, dbargc, (const char * const *)dbargv);
+	dns_zone_setdbtype(zone, dbargc, (const char * const *)dbargv);
 	isc_mem_put(mctx, dbargv, dbargc * sizeof(*dbargv));
-	if (cpval != default_dbtype && cpval != dlz_dbtype)
+	if (cpval != default_dbtype && cpval != dlz_dbtype) {
 		isc_mem_free(mctx, cpval);
-	if (result != ISC_R_SUCCESS)
-		return (result);
+	}
 
 	obj = NULL;
 	result = cfg_map_get(zoptions, "file", &obj);
diff --git a/bin/tests/optional/zone_test.c b/bin/tests/optional/zone_test.c
index 7bbc3a9c31..e9b07d9bc7 100644
--- a/bin/tests/optional/zone_test.c
+++ b/bin/tests/optional/zone_test.c
@@ -99,8 +99,7 @@ setup(const char *zonename, const char *filename, const char *classname) {
 	result = dns_zone_setorigin(zone, origin);
 	ERRRET(result, "dns_zone_setorigin");
 
-	result = dns_zone_setdbtype(zone, 1, &rbt);
-	ERRRET(result, "dns_zone_setdatabase");
+	dns_zone_setdbtype(zone, 1, &rbt);
 
 	result = dns_zone_setfile(zone, filename, dns_masterformat_text,
 				  &dns_master_style_default);
diff --git a/bin/tests/system/dyndb/driver/zone.c b/bin/tests/system/dyndb/driver/zone.c
index 683c8ca7a7..07c56cb298 100644
--- a/bin/tests/system/dyndb/driver/zone.c
+++ b/bin/tests/system/dyndb/driver/zone.c
@@ -57,13 +57,8 @@ create_zone(sample_instance_t * const inst, dns_name_t * const name,
 	}
 	dns_zone_setclass(raw, dns_rdataclass_in);
 	dns_zone_settype(raw, dns_zone_master);
-	result = dns_zone_setdbtype(raw, 1, zone_argv);
-	if (result != ISC_R_SUCCESS) {
-		log_write(ISC_LOG_ERROR,
-			  "create_zone: dns_zone_setdbtype -> %s\n",
-			  isc_result_totext(result));
-		goto cleanup;
-	}
+	dns_zone_setdbtype(raw, 1, zone_argv);
+
 	result = dns_zonemgr_managezone(inst->zmgr, raw);
 	if (result != ISC_R_SUCCESS) {
 		log_write(ISC_LOG_ERROR,
diff --git a/contrib/dlz/drivers/dlz_filesystem_driver.c b/contrib/dlz/drivers/dlz_filesystem_driver.c
index fb6c1a75b5..dbe15291d5 100644
--- a/contrib/dlz/drivers/dlz_filesystem_driver.c
+++ b/contrib/dlz/drivers/dlz_filesystem_driver.c
@@ -925,19 +925,6 @@ fs_create(const char *dlzname, unsigned int argc, char *argv[],
 
 	/* return success */
 	return (ISC_R_SUCCESS);
-
-	/* if we allocated a config data object clean it up */
-	if (cd != NULL)
-		fs_destroy(NULL, cd);
-
-	/* write error message */
-	isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
-		      DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
-		      "Filesystem driver unable to "
-		      "allocate memory for config data.");
-
-	/* return error */
-	return (ISC_R_NOMEMORY);
 }
 
 static void
diff --git a/lib/dns/include/dns/zone.h b/lib/dns/include/dns/zone.h
index 33c1131f7f..ccbc8a6d8e 100644
--- a/lib/dns/include/dns/zone.h
+++ b/lib/dns/include/dns/zone.h
@@ -483,7 +483,7 @@ dns_zone_setdb(dns_zone_t *zone, dns_db_t *db);
  *\li	zone doesn't have a database.
  */
 
-isc_result_t
+void
 dns_zone_setdbtype(dns_zone_t *zone,
 		   unsigned int dbargc, const char * const *dbargv);
 /*%<
@@ -496,10 +496,6 @@ dns_zone_setdbtype(dns_zone_t *zone,
  *\li	'database' to be non NULL.
  *\li	'dbargc' to be >= 1
  *\li	'dbargv' to point to dbargc NULL-terminated strings
- *
- * Returns:
- *\li	#ISC_R_NOMEMORY
- *\li	#ISC_R_SUCCESS
  */
 
 isc_result_t
diff --git a/lib/dns/zone.c b/lib/dns/zone.c
index e808ef076b..25e93d1047 100644
--- a/lib/dns/zone.c
+++ b/lib/dns/zone.c
@@ -1067,10 +1067,7 @@ dns_zone_create(dns_zone_t **zonep, isc_mem_t *mctx) {
 	}
 
 	/* Must be after magic is set. */
-	result = dns_zone_setdbtype(zone, dbargc_default, dbargv_default);
-	if (result != ISC_R_SUCCESS) {
-		goto free_stats;
-	}
+	dns_zone_setdbtype(zone, dbargc_default, dbargv_default);
 
 	ISC_EVENT_INIT(&zone->ctlevent, sizeof(zone->ctlevent), 0, NULL,
 		       DNS_EVENT_ZONECONTROL, zone_shutdown, zone, zone,
@@ -1078,10 +1075,6 @@ dns_zone_create(dns_zone_t **zonep, isc_mem_t *mctx) {
 	*zonep = zone;
 	return (ISC_R_SUCCESS);
 
- free_stats:
-	if (zone->gluecachestats != NULL)
-		isc_stats_detach(&zone->gluecachestats);
-
  free_erefs:
 	INSIST(isc_refcount_decrement(&zone->erefs) > 0);
 	isc_refcount_destroy(&zone->erefs);
@@ -1438,11 +1431,10 @@ dns_zone_getdbtype(dns_zone_t *zone, char ***argv, isc_mem_t *mctx) {
 	return (result);
 }
 
-isc_result_t
+void
 dns_zone_setdbtype(dns_zone_t *zone,
 		   unsigned int dbargc, const char * const *dbargv)
 {
-	isc_result_t result = ISC_R_SUCCESS;
 	char **argv = NULL;
 	unsigned int i;
 
@@ -1466,11 +1458,8 @@ dns_zone_setdbtype(dns_zone_t *zone,
 
 	zone->db_argc = dbargc;
 	zone->db_argv = argv;
-	result = ISC_R_SUCCESS;
 
 	UNLOCK_ZONE(zone);
-
-	return (result);
 }
 
 static void
diff --git a/lib/isc/mem.c b/lib/isc/mem.c
index 5199a61aff..fcfce23503 100644
--- a/lib/isc/mem.c
+++ b/lib/isc/mem.c
@@ -385,7 +385,7 @@ more_basic_blocks(isc__mem_t *ctx) {
 	ctx->basic_table_count++;
 	ctx->malloced += NUM_BASIC_BLOCKS * ctx->mem_target;
 	if (ctx->malloced > ctx->maxmalloced) {
-			ctx->maxmalloced = ctx->malloced;
+		ctx->maxmalloced = ctx->malloced;
 	}
 
 	curr = tmp;