diff --git a/src/admin/admin_server.c b/src/admin/admin_server.c
index 1d1ae97f2f..2498a1309a 100644
--- a/src/admin/admin_server.c
+++ b/src/admin/admin_server.c
@@ -89,29 +89,12 @@ adminServerGetThreadPoolParameters(virNetServer *srv,
         return -1;
     }
 
-    if (virTypedParamListAddUInt(paramlist, minWorkers,
-                                 "%s", VIR_THREADPOOL_WORKERS_MIN) < 0)
-        return -1;
-
-    if (virTypedParamListAddUInt(paramlist, maxWorkers,
-                                 "%s", VIR_THREADPOOL_WORKERS_MAX) < 0)
-        return -1;
-
-    if (virTypedParamListAddUInt(paramlist, nWorkers,
-                                 "%s", VIR_THREADPOOL_WORKERS_CURRENT) < 0)
-        return -1;
-
-    if (virTypedParamListAddUInt(paramlist, freeWorkers,
-                                 "%s", VIR_THREADPOOL_WORKERS_FREE) < 0)
-        return -1;
-
-    if (virTypedParamListAddUInt(paramlist, nPrioWorkers,
-                                 "%s", VIR_THREADPOOL_WORKERS_PRIORITY) < 0)
-        return -1;
-
-    if (virTypedParamListAddUInt(paramlist, jobQueueDepth,
-                                 "%s", VIR_THREADPOOL_JOB_QUEUE_DEPTH) < 0)
-        return -1;
+    virTypedParamListAddUInt(paramlist, minWorkers, VIR_THREADPOOL_WORKERS_MIN);
+    virTypedParamListAddUInt(paramlist, maxWorkers, VIR_THREADPOOL_WORKERS_MAX);
+    virTypedParamListAddUInt(paramlist, nWorkers, VIR_THREADPOOL_WORKERS_CURRENT);
+    virTypedParamListAddUInt(paramlist, freeWorkers, VIR_THREADPOOL_WORKERS_FREE);
+    virTypedParamListAddUInt(paramlist, nPrioWorkers, VIR_THREADPOOL_WORKERS_PRIORITY);
+    virTypedParamListAddUInt(paramlist, jobQueueDepth, VIR_THREADPOOL_JOB_QUEUE_DEPTH);
 
     if (virTypedParamListSteal(paramlist, params, nparams) < 0)
         return -1;
@@ -211,74 +194,54 @@ adminClientGetInfo(virNetServerClient *client,
                                   &sock_addr, &identity) < 0)
         return -1;
 
-    if (virTypedParamListAddBoolean(paramlist, readonly,
-                                    "%s", VIR_CLIENT_INFO_READONLY) < 0)
-        return -1;
+    virTypedParamListAddBoolean(paramlist, readonly, VIR_CLIENT_INFO_READONLY);
 
     if ((rc = virIdentityGetSASLUserName(identity, &attr)) < 0)
         return -1;
-    if (rc == 1 &&
-        virTypedParamListAddString(paramlist, attr,
-                                   "%s", VIR_CLIENT_INFO_SASL_USER_NAME) < 0)
-        return -1;
+    if (rc == 1)
+        virTypedParamListAddString(paramlist, attr, VIR_CLIENT_INFO_SASL_USER_NAME);
 
     if (!virNetServerClientIsLocal(client)) {
-        if (virTypedParamListAddString(paramlist, sock_addr,
-                                       "%s", VIR_CLIENT_INFO_SOCKET_ADDR) < 0)
-            return -1;
+        virTypedParamListAddString(paramlist, sock_addr, VIR_CLIENT_INFO_SOCKET_ADDR);
 
         if ((rc = virIdentityGetX509DName(identity, &attr)) < 0)
             return -1;
-        if (rc == 1 &&
-            virTypedParamListAddString(paramlist, attr,
-                                       "%s", VIR_CLIENT_INFO_X509_DISTINGUISHED_NAME) < 0)
-            return -1;
+        if (rc == 1)
+            virTypedParamListAddString(paramlist, attr, VIR_CLIENT_INFO_X509_DISTINGUISHED_NAME);
     } else {
         pid_t pid;
         uid_t uid;
         gid_t gid;
         if ((rc = virIdentityGetUNIXUserID(identity, &uid)) < 0)
             return -1;
-        if (rc == 1 &&
-            virTypedParamListAddInt(paramlist, uid,
-                                    "%s", VIR_CLIENT_INFO_UNIX_USER_ID) < 0)
-            return -1;
+        if (rc == 1)
+            virTypedParamListAddInt(paramlist, uid, VIR_CLIENT_INFO_UNIX_USER_ID);
 
         if ((rc = virIdentityGetUserName(identity, &attr)) < 0)
             return -1;
-        if (rc == 1 &&
-            virTypedParamListAddString(paramlist, attr,
-                                       "%s", VIR_CLIENT_INFO_UNIX_USER_NAME) < 0)
-            return -1;
+        if (rc == 1)
+            virTypedParamListAddString(paramlist, attr, VIR_CLIENT_INFO_UNIX_USER_NAME);
 
         if ((rc = virIdentityGetUNIXGroupID(identity, &gid)) < 0)
             return -1;
-        if (rc == 1 &&
-            virTypedParamListAddInt(paramlist, gid,
-                                    "%s", VIR_CLIENT_INFO_UNIX_GROUP_ID) < 0)
-            return -1;
+        if (rc == 1)
+            virTypedParamListAddInt(paramlist, gid, VIR_CLIENT_INFO_UNIX_GROUP_ID);
 
         if ((rc = virIdentityGetGroupName(identity, &attr)) < 0)
             return -1;
-        if (rc == 1 &&
-            virTypedParamListAddString(paramlist, attr,
-                                       "%s", VIR_CLIENT_INFO_UNIX_GROUP_NAME) < 0)
-            return -1;
+        if (rc == 1)
+            virTypedParamListAddString(paramlist, attr, VIR_CLIENT_INFO_UNIX_GROUP_NAME);
 
         if ((rc = virIdentityGetProcessID(identity, &pid)) < 0)
             return -1;
-        if (rc == 1 &&
-            virTypedParamListAddInt(paramlist, pid,
-                                    "%s", VIR_CLIENT_INFO_UNIX_PROCESS_ID) < 0)
-            return -1;
+        if (rc == 1)
+            virTypedParamListAddInt(paramlist, pid, VIR_CLIENT_INFO_UNIX_PROCESS_ID);
     }
 
     if ((rc = virIdentityGetSELinuxContext(identity, &attr)) < 0)
         return -1;
-    if (rc == 1 &&
-        virTypedParamListAddString(paramlist, attr,
-                                   "%s", VIR_CLIENT_INFO_SELINUX_CONTEXT) < 0)
-        return -1;
+    if (rc == 1)
+        virTypedParamListAddString(paramlist, attr, VIR_CLIENT_INFO_SELINUX_CONTEXT);
 
     if (virTypedParamListSteal(paramlist, params, nparams) < 0)
         return -1;
@@ -305,25 +268,10 @@ adminServerGetClientLimits(virNetServer *srv,
 
     virCheckFlags(0, -1);
 
-    if (virTypedParamListAddUInt(paramlist,
-                                 virNetServerGetMaxClients(srv),
-                                 "%s", VIR_SERVER_CLIENTS_MAX) < 0)
-        return -1;
-
-    if (virTypedParamListAddUInt(paramlist,
-                                 virNetServerGetCurrentClients(srv),
-                                 "%s", VIR_SERVER_CLIENTS_CURRENT) < 0)
-        return -1;
-
-    if (virTypedParamListAddUInt(paramlist,
-                                 virNetServerGetMaxUnauthClients(srv),
-                                 "%s", VIR_SERVER_CLIENTS_UNAUTH_MAX) < 0)
-        return -1;
-
-    if (virTypedParamListAddUInt(paramlist,
-                                 virNetServerGetCurrentUnauthClients(srv),
-                                 "%s", VIR_SERVER_CLIENTS_UNAUTH_CURRENT) < 0)
-        return -1;
+    virTypedParamListAddUInt(paramlist, virNetServerGetMaxClients(srv), VIR_SERVER_CLIENTS_MAX);
+    virTypedParamListAddUInt(paramlist, virNetServerGetCurrentClients(srv), VIR_SERVER_CLIENTS_CURRENT);
+    virTypedParamListAddUInt(paramlist, virNetServerGetMaxUnauthClients(srv), VIR_SERVER_CLIENTS_UNAUTH_MAX);
+    virTypedParamListAddUInt(paramlist, virNetServerGetCurrentUnauthClients(srv), VIR_SERVER_CLIENTS_UNAUTH_CURRENT);
 
     if (virTypedParamListSteal(paramlist, params, nparams) < 0)
         return -1;
diff --git a/src/qemu/qemu_domainjob.c b/src/qemu/qemu_domainjob.c
index 6be48118b9..245e51f14b 100644
--- a/src/qemu/qemu_domainjob.c
+++ b/src/qemu/qemu_domainjob.c
@@ -480,47 +480,26 @@ qemuDomainBackupJobDataToParams(virDomainJobData *jobData,
     qemuDomainBackupStats *stats = &priv->stats.backup;
     g_autoptr(virTypedParamList) par = virTypedParamListNew();
 
-    if (virTypedParamListAddInt(par, jobData->operation,
-                                VIR_DOMAIN_JOB_OPERATION) < 0)
-        return -1;
-
-    if (virTypedParamListAddULLong(par, jobData->timeElapsed,
-                                   VIR_DOMAIN_JOB_TIME_ELAPSED) < 0)
-        return -1;
+    virTypedParamListAddInt(par, jobData->operation, VIR_DOMAIN_JOB_OPERATION);
+    virTypedParamListAddULLong(par, jobData->timeElapsed, VIR_DOMAIN_JOB_TIME_ELAPSED);
 
     if (stats->transferred > 0 || stats->total > 0) {
-        if (virTypedParamListAddULLong(par, stats->total,
-                                       VIR_DOMAIN_JOB_DISK_TOTAL) < 0)
-            return -1;
-
-        if (virTypedParamListAddULLong(par, stats->transferred,
-                                       VIR_DOMAIN_JOB_DISK_PROCESSED) < 0)
-            return -1;
-
-        if (virTypedParamListAddULLong(par, stats->total - stats->transferred,
-                                       VIR_DOMAIN_JOB_DISK_REMAINING) < 0)
-            return -1;
+        virTypedParamListAddULLong(par, stats->total, VIR_DOMAIN_JOB_DISK_TOTAL);
+        virTypedParamListAddULLong(par, stats->transferred, VIR_DOMAIN_JOB_DISK_PROCESSED);
+        virTypedParamListAddULLong(par, stats->total - stats->transferred, VIR_DOMAIN_JOB_DISK_REMAINING);
     }
 
     if (stats->tmp_used > 0 || stats->tmp_total > 0) {
-        if (virTypedParamListAddULLong(par, stats->tmp_used,
-                                       VIR_DOMAIN_JOB_DISK_TEMP_USED) < 0)
-            return -1;
-
-        if (virTypedParamListAddULLong(par, stats->tmp_total,
-                                       VIR_DOMAIN_JOB_DISK_TEMP_TOTAL) < 0)
-            return -1;
+        virTypedParamListAddULLong(par, stats->tmp_used, VIR_DOMAIN_JOB_DISK_TEMP_USED);
+        virTypedParamListAddULLong(par, stats->tmp_total, VIR_DOMAIN_JOB_DISK_TEMP_TOTAL);
     }
 
-    if (jobData->status != VIR_DOMAIN_JOB_STATUS_ACTIVE &&
-        virTypedParamListAddBoolean(par,
-                                    jobData->status == VIR_DOMAIN_JOB_STATUS_COMPLETED,
-                                    VIR_DOMAIN_JOB_SUCCESS) < 0)
-        return -1;
+    if (jobData->status != VIR_DOMAIN_JOB_STATUS_ACTIVE)
+        virTypedParamListAddBoolean(par, jobData->status == VIR_DOMAIN_JOB_STATUS_COMPLETED,
+                                    VIR_DOMAIN_JOB_SUCCESS);
 
-    if (jobData->errmsg &&
-        virTypedParamListAddString(par, jobData->errmsg, VIR_DOMAIN_JOB_ERRMSG) < 0)
-        return -1;
+    if (jobData->errmsg)
+        virTypedParamListAddString(par, jobData->errmsg, VIR_DOMAIN_JOB_ERRMSG);
 
     if (virTypedParamListSteal(par, params, nparams) < 0)
         return -1;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 24f6f81141..16a7f7acd3 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -16507,11 +16507,8 @@ qemuDomainGetStatsState(virQEMUDriver *driver G_GNUC_UNUSED,
                         virTypedParamList *params,
                         unsigned int privflags G_GNUC_UNUSED)
 {
-    if (virTypedParamListAddInt(params, dom->state.state, "state.state") < 0)
-        return -1;
-
-    if (virTypedParamListAddInt(params, dom->state.reason, "state.reason") < 0)
-        return -1;
+    virTypedParamListAddInt(params, dom->state.state, "state.state");
+    virTypedParamListAddInt(params, dom->state.reason, "state.reason");
 
     return 0;
 }
@@ -16670,33 +16667,16 @@ qemuDomainGetStatsMemoryBandwidth(virQEMUDriver *driver,
     if (nresdata == 0)
         return 0;
 
-    if (virTypedParamListAddUInt(params, nresdata,
-                                 "memory.bandwidth.monitor.count") < 0)
-        goto cleanup;
+    virTypedParamListAddUInt(params, nresdata, "memory.bandwidth.monitor.count");
 
     for (i = 0; i < nresdata; i++) {
-        if (virTypedParamListAddString(params, resdata[i]->name,
-                                       "memory.bandwidth.monitor.%zu.name",
-                                       i) < 0)
-            goto cleanup;
-
-        if (virTypedParamListAddString(params, resdata[i]->vcpus,
-                                       "memory.bandwidth.monitor.%zu.vcpus",
-                                       i) < 0)
-            goto cleanup;
-
-        if (virTypedParamListAddUInt(params, resdata[i]->nstats,
-                                     "memory.bandwidth.monitor.%zu.node.count",
-                                     i) < 0)
-            goto cleanup;
-
+        virTypedParamListAddString(params, resdata[i]->name, "memory.bandwidth.monitor.%zu.name", i);
+        virTypedParamListAddString(params, resdata[i]->vcpus, "memory.bandwidth.monitor.%zu.vcpus", i);
+        virTypedParamListAddUInt(params, resdata[i]->nstats, "memory.bandwidth.monitor.%zu.node.count", i);
 
         for (j = 0; j < resdata[i]->nstats; j++) {
-            if (virTypedParamListAddUInt(params, resdata[i]->stats[j]->id,
-                                         "memory.bandwidth.monitor.%zu."
-                                         "node.%zu.id",
-                                         i, j) < 0)
-                goto cleanup;
+            virTypedParamListAddUInt(params, resdata[i]->stats[j]->id,
+                                     "memory.bandwidth.monitor.%zu.node.%zu.id", i, j);
 
 
             features = resdata[i]->stats[j]->features;
@@ -16704,23 +16684,15 @@ qemuDomainGetStatsMemoryBandwidth(virQEMUDriver *driver,
                 if (STREQ(features[k], "mbm_local_bytes")) {
                     /* The accumulative data passing through local memory
                      * controller is recorded with 64 bit counter. */
-                    if (virTypedParamListAddULLong(params,
-                                                   resdata[i]->stats[j]->vals[k],
-                                                   "memory.bandwidth.monitor."
-                                                   "%zu.node.%zu.bytes.local",
-                                                   i, j) < 0)
-                        goto cleanup;
+                    virTypedParamListAddULLong(params, resdata[i]->stats[j]->vals[k],
+                                               "memory.bandwidth.monitor.%zu.node.%zu.bytes.local", i, j);
                 }
 
                 if (STREQ(features[k], "mbm_total_bytes")) {
                     /* The accumulative data passing through local and remote
                      * memory controller is recorded with 64 bit counter. */
-                    if (virTypedParamListAddULLong(params,
-                                                   resdata[i]->stats[j]->vals[k],
-                                                   "memory.bandwidth.monitor."
-                                                   "%zu.node.%zu.bytes.total",
-                                                   i, j) < 0)
-                        goto cleanup;
+                    virTypedParamListAddULLong(params, resdata[i]->stats[j]->vals[k],
+                                               "memory.bandwidth.monitor.%zu.node.%zu.bytes.total", i, j);
                 }
             }
         }
@@ -16753,26 +16725,16 @@ qemuDomainGetStatsCpuCache(virQEMUDriver *driver,
                                     VIR_RESCTRL_MONITOR_TYPE_CACHE) < 0)
         goto cleanup;
 
-    if (virTypedParamListAddUInt(params, nresdata, "cpu.cache.monitor.count") < 0)
-        goto cleanup;
+    virTypedParamListAddUInt(params, nresdata, "cpu.cache.monitor.count");
 
     for (i = 0; i < nresdata; i++) {
-        if (virTypedParamListAddString(params, resdata[i]->name,
-                                       "cpu.cache.monitor.%zu.name", i) < 0)
-            goto cleanup;
-
-        if (virTypedParamListAddString(params, resdata[i]->vcpus,
-                                       "cpu.cache.monitor.%zu.vcpus", i) < 0)
-            goto cleanup;
-
-        if (virTypedParamListAddUInt(params, resdata[i]->nstats,
-                                     "cpu.cache.monitor.%zu.bank.count", i) < 0)
-            goto cleanup;
+        virTypedParamListAddString(params, resdata[i]->name, "cpu.cache.monitor.%zu.name", i);
+        virTypedParamListAddString(params, resdata[i]->vcpus, "cpu.cache.monitor.%zu.vcpus", i);
+        virTypedParamListAddUInt(params, resdata[i]->nstats, "cpu.cache.monitor.%zu.bank.count", i);
 
         for (j = 0; j < resdata[i]->nstats; j++) {
-            if (virTypedParamListAddUInt(params, resdata[i]->stats[j]->id,
-                                         "cpu.cache.monitor.%zu.bank.%zu.id", i, j) < 0)
-                goto cleanup;
+            virTypedParamListAddUInt(params, resdata[i]->stats[j]->id,
+                                     "cpu.cache.monitor.%zu.bank.%zu.id", i, j);
 
             /* 'resdata[i]->stats[j]->vals[0]' keeps the value of how many last
              * level cache in bank j currently occupied by the vcpus listed in
@@ -16783,11 +16745,8 @@ qemuDomainGetStatsCpuCache(virQEMUDriver *driver,
              * than 4G bytes in size, to keep the 'domstats' interface
              * historically consistent, it is safe to report the value with a
              * truncated 'UInt' data type here. */
-            if (virTypedParamListAddUInt(params,
-                                         (unsigned int)resdata[i]->stats[j]->vals[0],
-                                         "cpu.cache.monitor.%zu.bank.%zu.bytes",
-                                         i, j) < 0)
-                goto cleanup;
+            virTypedParamListAddUInt(params, (unsigned int)resdata[i]->stats[j]->vals[0],
+                                     "cpu.cache.monitor.%zu.bank.%zu.bytes", i, j);
         }
     }
 
@@ -16808,20 +16767,17 @@ qemuDomainGetStatsCpuCgroup(virDomainObj *dom,
     unsigned long long cpu_time = 0;
     unsigned long long user_time = 0;
     unsigned long long sys_time = 0;
-    int err = 0;
 
     if (!priv->cgroup)
         return 0;
 
-    err = virCgroupGetCpuacctUsage(priv->cgroup, &cpu_time);
-    if (!err && virTypedParamListAddULLong(params, cpu_time, "cpu.time") < 0)
-        return -1;
+    if (virCgroupGetCpuacctUsage(priv->cgroup, &cpu_time) == 0)
+        virTypedParamListAddULLong(params, cpu_time, "cpu.time");
 
-    err = virCgroupGetCpuacctStat(priv->cgroup, &user_time, &sys_time);
-    if (!err && virTypedParamListAddULLong(params, user_time, "cpu.user") < 0)
-        return -1;
-    if (!err && virTypedParamListAddULLong(params, sys_time, "cpu.system") < 0)
-        return -1;
+    if (virCgroupGetCpuacctStat(priv->cgroup, &user_time, &sys_time) == 0) {
+        virTypedParamListAddULLong(params, user_time, "cpu.user");
+        virTypedParamListAddULLong(params, sys_time, "cpu.system");
+    }
 
     return 0;
 }
@@ -16841,10 +16797,9 @@ qemuDomainGetStatsCpuProc(virDomainObj *vm,
         return 0;
     }
 
-    if (virTypedParamListAddULLong(params, cpuTime, "cpu.time") < 0 ||
-        virTypedParamListAddULLong(params, userTime, "cpu.user") < 0 ||
-        virTypedParamListAddULLong(params, sysTime, "cpu.system") < 0)
-        return -1;
+    virTypedParamListAddULLong(params, cpuTime, "cpu.time");
+    virTypedParamListAddULLong(params, userTime, "cpu.user");
+    virTypedParamListAddULLong(params, sysTime, "cpu.system");
 
     return 0;
 }
@@ -16932,9 +16887,8 @@ qemuDomainGetStatsCpuHaltPollTime(virDomainObj *dom,
         virHostCPUGetHaltPollTime(dom->pid, &haltPollSuccess, &haltPollFail) < 0)
         return 0;
 
-    if (virTypedParamListAddULLong(params, haltPollSuccess, "cpu.haltpoll.success.time") < 0 ||
-        virTypedParamListAddULLong(params, haltPollFail, "cpu.haltpoll.fail.time") < 0)
-        return -1;
+    virTypedParamListAddULLong(params, haltPollSuccess, "cpu.haltpoll.success.time");
+    virTypedParamListAddULLong(params, haltPollFail, "cpu.haltpoll.fail.time");
 
     return 0;
 }
@@ -16993,12 +16947,8 @@ qemuDomainGetStatsBalloon(virQEMUDriver *driver G_GNUC_UNUSED,
         cur_balloon = dom->def->mem.cur_balloon;
     }
 
-    if (virTypedParamListAddULLong(params, cur_balloon, "balloon.current") < 0)
-        return -1;
-
-    if (virTypedParamListAddULLong(params, virDomainDefGetMemoryTotal(dom->def),
-                                   "balloon.maximum") < 0)
-        return -1;
+    virTypedParamListAddULLong(params, cur_balloon, "balloon.current");
+    virTypedParamListAddULLong(params, virDomainDefGetMemoryTotal(dom->def), "balloon.maximum");
 
     if (!HAVE_JOB(privflags) || !virDomainObjIsActive(dom))
         return 0;
@@ -17010,8 +16960,7 @@ qemuDomainGetStatsBalloon(virQEMUDriver *driver G_GNUC_UNUSED,
 
 #define STORE_MEM_RECORD(TAG, NAME) \
     if (stats[i].tag == VIR_DOMAIN_MEMORY_STAT_ ##TAG) \
-        if (virTypedParamListAddULLong(params, stats[i].val, "balloon." NAME) < 0) \
-            return -1;
+        virTypedParamListAddULLong(params, stats[i].val, "balloon." NAME);
 
     for (i = 0; i < nr_stats; i++) {
         STORE_MEM_RECORD(SWAP_IN, "swap_in")
@@ -17080,16 +17029,14 @@ qemuDomainAddStatsFromHashTable(GHashTable *stats,
             if (virJSONValueGetBoolean(value, &stat) < 0)
                 continue;
 
-            ignore_value(virTypedParamListAddBoolean(params, stat, "%s.%s.%s",
-                                                     prefix, key, type));
+            virTypedParamListAddBoolean(params, stat, "%s.%s.%s", prefix, key, type);
         } else {
             unsigned long long stat;
 
             if (virJSONValueGetNumberUlong(value, &stat) < 0)
                 continue;
 
-            ignore_value(virTypedParamListAddULLong(params, stat, "%s.%s.%s",
-                                                    prefix, key, type));
+            virTypedParamListAddULLong(params, stat, "%s.%s.%s", prefix, key, type);
         }
     }
 }
@@ -17110,13 +17057,8 @@ qemuDomainGetStatsVcpu(virQEMUDriver *driver G_GNUC_UNUSED,
     qemuDomainObjPrivate *priv = dom->privateData;
     g_autoptr(virJSONValue) queried_stats = NULL;
 
-    if (virTypedParamListAddUInt(params, virDomainDefGetVcpus(dom->def),
-                                 "vcpu.current") < 0)
-        return -1;
-
-    if (virTypedParamListAddUInt(params, virDomainDefGetVcpusMax(dom->def),
-                                 "vcpu.maximum") < 0)
-        return -1;
+    virTypedParamListAddUInt(params, virDomainDefGetVcpus(dom->def), "vcpu.current");
+    virTypedParamListAddUInt(params, virDomainDefGetVcpusMax(dom->def), "vcpu.maximum");
 
     cpuinfo = g_new0(virVcpuInfo, virDomainDefGetVcpus(dom->def));
     cpuwait = g_new0(unsigned long long, virDomainDefGetVcpus(dom->def));
@@ -17149,25 +17091,15 @@ qemuDomainGetStatsVcpu(virQEMUDriver *driver G_GNUC_UNUSED,
         g_autoptr(GHashTable) stats = NULL;
         g_autofree char *prefix = g_strdup_printf("vcpu.%u", cpuinfo[i].number);
 
-        if (virTypedParamListAddInt(params, cpuinfo[i].state,
-                                    "vcpu.%u.state", cpuinfo[i].number) < 0)
-            return -1;
+        virTypedParamListAddInt(params, cpuinfo[i].state, "vcpu.%u.state", cpuinfo[i].number);
 
         /* stats below are available only if the VM is alive */
         if (!virDomainObjIsActive(dom))
             continue;
 
-        if (virTypedParamListAddULLong(params, cpuinfo[i].cpuTime,
-                                       "vcpu.%u.time", cpuinfo[i].number) < 0)
-            return -1;
-
-        if (virTypedParamListAddULLong(params, cpuwait[i],
-                                       "vcpu.%u.wait", cpuinfo[i].number) < 0)
-            return -1;
-
-        if (virTypedParamListAddULLong(params, cpudelay[i],
-                                        "vcpu.%u.delay", cpuinfo[i].number) < 0)
-            return -1;
+        virTypedParamListAddULLong(params, cpuinfo[i].cpuTime, "vcpu.%u.time", cpuinfo[i].number);
+        virTypedParamListAddULLong(params, cpuwait[i], "vcpu.%u.wait", cpuinfo[i].number);
+        virTypedParamListAddULLong(params, cpudelay[i], "vcpu.%u.delay", cpuinfo[i].number);
 
         /* state below is extracted from the individual vcpu structs */
         if (!(vcpu = virDomainDefGetVcpu(dom->def, cpuinfo[i].number)))
@@ -17176,11 +17108,8 @@ qemuDomainGetStatsVcpu(virQEMUDriver *driver G_GNUC_UNUSED,
         vcpupriv = QEMU_DOMAIN_VCPU_PRIVATE(vcpu);
 
         if (vcpupriv->halted != VIR_TRISTATE_BOOL_ABSENT) {
-            if (virTypedParamListAddBoolean(params,
-                                            vcpupriv->halted == VIR_TRISTATE_BOOL_YES,
-                                            "vcpu.%u.halted",
-                                            cpuinfo[i].number) < 0)
-                return -1;
+            virTypedParamListAddBoolean(params, vcpupriv->halted == VIR_TRISTATE_BOOL_YES,
+                                        "vcpu.%u.halted", cpuinfo[i].number);
         }
 
         if (!queried_stats)
@@ -17196,9 +17125,8 @@ qemuDomainGetStatsVcpu(virQEMUDriver *driver G_GNUC_UNUSED,
 }
 
 #define QEMU_ADD_NET_PARAM(params, num, name, value) \
-    if (value >= 0 && \
-        virTypedParamListAddULLong((params), (value), "net.%zu.%s", (num), (name)) < 0) \
-        return -1;
+    if (value >= 0)\
+        virTypedParamListAddULLong((params), (value), "net.%zu.%s", (num), (name));
 
 static int
 qemuDomainGetStatsInterface(virQEMUDriver *driver G_GNUC_UNUSED,
@@ -17212,8 +17140,7 @@ qemuDomainGetStatsInterface(virQEMUDriver *driver G_GNUC_UNUSED,
     if (!virDomainObjIsActive(dom))
         return 0;
 
-    if (virTypedParamListAddUInt(params, dom->def->nnets, "net.count") < 0)
-        return -1;
+    virTypedParamListAddUInt(params, dom->def->nnets, "net.count");
 
     /* Check the path is one of the domain's network interfaces. */
     for (i = 0; i < dom->def->nnets; i++) {
@@ -17227,8 +17154,7 @@ qemuDomainGetStatsInterface(virQEMUDriver *driver G_GNUC_UNUSED,
 
         actualType = virDomainNetGetActualType(net);
 
-        if (virTypedParamListAddString(params, net->ifname, "net.%zu.name", i) < 0)
-            return -1;
+        virTypedParamListAddString(params, net->ifname, "net.%zu.name", i);
 
         if (actualType == VIR_DOMAIN_NET_TYPE_VHOSTUSER) {
             if (virNetDevOpenvswitchInterfaceStats(net->ifname, &tmp) < 0) {
@@ -17243,22 +17169,14 @@ qemuDomainGetStatsInterface(virQEMUDriver *driver G_GNUC_UNUSED,
             }
         }
 
-        QEMU_ADD_NET_PARAM(params, i,
-                           "rx.bytes", tmp.rx_bytes);
-        QEMU_ADD_NET_PARAM(params, i,
-                           "rx.pkts", tmp.rx_packets);
-        QEMU_ADD_NET_PARAM(params, i,
-                           "rx.errs", tmp.rx_errs);
-        QEMU_ADD_NET_PARAM(params, i,
-                           "rx.drop", tmp.rx_drop);
-        QEMU_ADD_NET_PARAM(params, i,
-                           "tx.bytes", tmp.tx_bytes);
-        QEMU_ADD_NET_PARAM(params, i,
-                           "tx.pkts", tmp.tx_packets);
-        QEMU_ADD_NET_PARAM(params, i,
-                           "tx.errs", tmp.tx_errs);
-        QEMU_ADD_NET_PARAM(params, i,
-                           "tx.drop", tmp.tx_drop);
+        QEMU_ADD_NET_PARAM(params, i, "rx.bytes", tmp.rx_bytes);
+        QEMU_ADD_NET_PARAM(params, i, "rx.pkts", tmp.rx_packets);
+        QEMU_ADD_NET_PARAM(params, i, "rx.errs", tmp.rx_errs);
+        QEMU_ADD_NET_PARAM(params, i, "rx.drop", tmp.rx_drop);
+        QEMU_ADD_NET_PARAM(params, i, "tx.bytes", tmp.tx_bytes);
+        QEMU_ADD_NET_PARAM(params, i, "tx.pkts", tmp.tx_packets);
+        QEMU_ADD_NET_PARAM(params, i, "tx.errs", tmp.tx_errs);
+        QEMU_ADD_NET_PARAM(params, i, "tx.drop", tmp.tx_drop);
     }
 
     return 0;
@@ -17286,20 +17204,14 @@ qemuDomainGetStatsOneBlockFallback(virQEMUDriver *driver,
         return 0;
     }
 
-    if (src->allocation &&
-        virTypedParamListAddULLong(params, src->allocation,
-                                   "block.%zu.allocation", block_idx) < 0)
-        return -1;
+    if (src->allocation)
+        virTypedParamListAddULLong(params, src->allocation, "block.%zu.allocation", block_idx);
 
-    if (src->capacity &&
-        virTypedParamListAddULLong(params, src->capacity,
-                                   "block.%zu.capacity", block_idx) < 0)
-        return -1;
+    if (src->capacity)
+        virTypedParamListAddULLong(params, src->capacity, "block.%zu.capacity", block_idx);
 
-    if (src->physical &&
-        virTypedParamListAddULLong(params, src->physical,
-                                   "block.%zu.physical", block_idx) < 0)
-        return -1;
+    if (src->physical)
+        virTypedParamListAddULLong(params, src->physical, "block.%zu.physical", block_idx);
 
     return 0;
 }
@@ -17330,24 +17242,16 @@ qemuDomainGetStatsOneBlock(virQEMUDriver *driver,
     if (!stats || !entryname || !(entry = virHashLookup(stats, entryname)))
         return 0;
 
-    if (virTypedParamListAddULLong(params, entry->wr_highest_offset,
-                                   "block.%zu.allocation", block_idx) < 0)
-        return -1;
+    virTypedParamListAddULLong(params, entry->wr_highest_offset, "block.%zu.allocation", block_idx);
 
-    if (entry->capacity &&
-        virTypedParamListAddULLong(params, entry->capacity,
-                                   "block.%zu.capacity", block_idx) < 0)
-        return -1;
+    if (entry->capacity)
+        virTypedParamListAddULLong(params, entry->capacity, "block.%zu.capacity", block_idx);
 
     if (entry->physical) {
-        if (virTypedParamListAddULLong(params, entry->physical,
-                                       "block.%zu.physical", block_idx) < 0)
-            return -1;
+        virTypedParamListAddULLong(params, entry->physical, "block.%zu.physical", block_idx);
     } else {
         if (qemuDomainStorageUpdatePhysical(driver, cfg, dom, src) == 0) {
-            if (virTypedParamListAddULLong(params, src->physical,
-                                           "block.%zu.physical", block_idx) < 0)
-                return -1;
+            virTypedParamListAddULLong(params, src->physical, "block.%zu.physical", block_idx);
         }
     }
 
@@ -17366,10 +17270,8 @@ qemuDomainGetStatsBlockExportBackendStorage(const char *entryname,
     if (!stats || !entryname || !(entry = virHashLookup(stats, entryname)))
         return 0;
 
-    if (entry->write_threshold &&
-        virTypedParamListAddULLong(params, entry->write_threshold,
-                                   "block.%zu.threshold", recordnr) < 0)
-        return -1;
+    if (entry->write_threshold)
+        virTypedParamListAddULLong(params, entry->write_threshold, "block.%zu.threshold", recordnr);
 
     return 0;
 }
@@ -17389,15 +17291,14 @@ qemuDomainGetStatsBlockExportFrontend(const char *frontendname,
     if (!stats || !frontendname || !(en = virHashLookup(stats, frontendname)))
         return 0;
 
-    if (virTypedParamListAddULLong(par, en->rd_req, "block.%zu.rd.reqs", idx) < 0 ||
-        virTypedParamListAddULLong(par, en->rd_bytes, "block.%zu.rd.bytes", idx) < 0 ||
-        virTypedParamListAddULLong(par, en->rd_total_times, "block.%zu.rd.times", idx) < 0 ||
-        virTypedParamListAddULLong(par, en->wr_req, "block.%zu.wr.reqs", idx) < 0 ||
-        virTypedParamListAddULLong(par, en->wr_bytes, "block.%zu.wr.bytes", idx) < 0 ||
-        virTypedParamListAddULLong(par, en->wr_total_times, "block.%zu.wr.times", idx) < 0 ||
-        virTypedParamListAddULLong(par, en->flush_req, "block.%zu.fl.reqs", idx) < 0 ||
-        virTypedParamListAddULLong(par, en->flush_total_times, "block.%zu.fl.times", idx) < 0)
-        return -1;
+    virTypedParamListAddULLong(par, en->rd_req, "block.%zu.rd.reqs", idx);
+    virTypedParamListAddULLong(par, en->rd_bytes, "block.%zu.rd.bytes", idx);
+    virTypedParamListAddULLong(par, en->rd_total_times, "block.%zu.rd.times", idx);
+    virTypedParamListAddULLong(par, en->wr_req, "block.%zu.wr.reqs", idx);
+    virTypedParamListAddULLong(par, en->wr_bytes, "block.%zu.wr.bytes", idx);
+    virTypedParamListAddULLong(par, en->wr_total_times, "block.%zu.wr.times", idx);
+    virTypedParamListAddULLong(par, en->flush_req, "block.%zu.fl.reqs", idx);
+    virTypedParamListAddULLong(par, en->flush_total_times, "block.%zu.fl.times", idx);
 
     return 0;
 }
@@ -17409,16 +17310,13 @@ qemuDomainGetStatsBlockExportHeader(virDomainDiskDef *disk,
                                     size_t recordnr,
                                     virTypedParamList *params)
 {
-    if (virTypedParamListAddString(params, disk->dst, "block.%zu.name", recordnr) < 0)
-        return -1;
+    virTypedParamListAddString(params, disk->dst, "block.%zu.name", recordnr);
 
-    if (virStorageSourceIsLocalStorage(src) && src->path &&
-        virTypedParamListAddString(params, src->path, "block.%zu.path", recordnr) < 0)
-        return -1;
+    if (virStorageSourceIsLocalStorage(src) && src->path)
+        virTypedParamListAddString(params, src->path, "block.%zu.path", recordnr);
 
-    if (src->id &&
-        virTypedParamListAddUInt(params, src->id, "block.%zu.backingIndex", recordnr) < 0)
-        return -1;
+    if (src->id)
+        virTypedParamListAddUInt(params, src->id, "block.%zu.backingIndex", recordnr);
 
     return 0;
 }
@@ -17620,9 +17518,7 @@ qemuDomainGetStatsBlock(virQEMUDriver *driver,
             return -1;
     }
 
-    if (virTypedParamListAddUInt(params, visited, "block.count") < 0)
-        return -1;
-
+    virTypedParamListAddUInt(params, visited, "block.count");
     virTypedParamListConcat(params, &blockparams);
 
     return 0;
@@ -17653,23 +17549,19 @@ qemuDomainGetStatsIOThread(virQEMUDriver *driver G_GNUC_UNUSED,
         goto cleanup;
     }
 
-    if (virTypedParamListAddUInt(params, niothreads, "iothread.count") < 0)
-        goto cleanup;
+    virTypedParamListAddUInt(params, niothreads, "iothread.count");
 
     for (i = 0; i < niothreads; i++) {
         if (iothreads[i]->poll_valid) {
-            if (virTypedParamListAddULLong(params, iothreads[i]->poll_max_ns,
-                                           "iothread.%u.poll-max-ns",
-                                           iothreads[i]->iothread_id) < 0)
-                goto cleanup;
-            if (virTypedParamListAddUInt(params, iothreads[i]->poll_grow,
-                                         "iothread.%u.poll-grow",
-                                         iothreads[i]->iothread_id) < 0)
-                goto cleanup;
-            if (virTypedParamListAddUInt(params, iothreads[i]->poll_shrink,
-                                         "iothread.%u.poll-shrink",
-                                         iothreads[i]->iothread_id) < 0)
-                goto cleanup;
+            virTypedParamListAddULLong(params, iothreads[i]->poll_max_ns,
+                                       "iothread.%u.poll-max-ns",
+                                       iothreads[i]->iothread_id);
+            virTypedParamListAddUInt(params, iothreads[i]->poll_grow,
+                                     "iothread.%u.poll-grow",
+                                     iothreads[i]->iothread_id);
+            virTypedParamListAddUInt(params, iothreads[i]->poll_shrink,
+                                     "iothread.%u.poll-shrink",
+                                     iothreads[i]->iothread_id);
         }
     }
 
@@ -17694,9 +17586,7 @@ qemuDomainGetStatsPerfOneEvent(virPerf *perf,
     if (virPerfReadEvent(perf, type, &value) < 0)
         return -1;
 
-    if (virTypedParamListAddULLong(params, value, "perf.%s",
-                                   virPerfEventTypeToString(type)) < 0)
-        return -1;
+    virTypedParamListAddULLong(params, value, "perf.%s", virPerfEventTypeToString(type));
 
     return 0;
 }
@@ -17749,35 +17639,21 @@ qemuDomainGetStatsDirtyRate(virQEMUDriver *driver G_GNUC_UNUSED,
     if (qemuDomainGetStatsDirtyRateMon(dom, &info) < 0)
         return -1;
 
-    if (virTypedParamListAddInt(params, info.status,
-                                "dirtyrate.calc_status") < 0)
-        return -1;
-
-    if (virTypedParamListAddLLong(params, info.startTime,
-                                  "dirtyrate.calc_start_time") < 0)
-        return -1;
-
-    if (virTypedParamListAddInt(params, info.calcTime,
-                                "dirtyrate.calc_period") < 0)
-        return -1;
-
-    if (virTypedParamListAddString(params,
-                                   qemuMonitorDirtyRateCalcModeTypeToString(info.mode),
-                                   "dirtyrate.calc_mode") < 0)
-        return -1;
+    virTypedParamListAddInt(params, info.status, "dirtyrate.calc_status");
+    virTypedParamListAddLLong(params, info.startTime, "dirtyrate.calc_start_time");
+    virTypedParamListAddInt(params, info.calcTime, "dirtyrate.calc_period");
+    virTypedParamListAddString(params, qemuMonitorDirtyRateCalcModeTypeToString(info.mode),
+                               "dirtyrate.calc_mode");
 
     if (info.status == VIR_DOMAIN_DIRTYRATE_MEASURED) {
-        if (virTypedParamListAddLLong(params, info.dirtyRate,
-                                      "dirtyrate.megabytes_per_second") < 0)
-            return -1;
+        virTypedParamListAddLLong(params, info.dirtyRate, "dirtyrate.megabytes_per_second");
 
         if (info.mode == QEMU_MONITOR_DIRTYRATE_CALC_MODE_DIRTY_RING) {
             size_t i;
             for (i = 0; i < info.nvcpus; i++) {
-                if (virTypedParamListAddULLong(params, info.rates[i].value,
-                                               "dirtyrate.vcpu.%d.megabytes_per_second",
-                                               info.rates[i].idx) < 0)
-                    return -1;
+                virTypedParamListAddULLong(params, info.rates[i].value,
+                                           "dirtyrate.vcpu.%d.megabytes_per_second",
+                                           info.rates[i].idx);
             }
         }
     }
diff --git a/src/test/test_driver.c b/src/test/test_driver.c
index ac12488de9..e7fce053b4 100644
--- a/src/test/test_driver.c
+++ b/src/test/test_driver.c
@@ -9784,11 +9784,8 @@ static int
 testDomainGetStatsState(virDomainObj *dom,
                         virTypedParamList *params)
 {
-    if (virTypedParamListAddInt(params, dom->state.state, "state.state") < 0)
-        return -1;
-
-    if (virTypedParamListAddInt(params, dom->state.reason, "state.reason") < 0)
-        return -1;
+    virTypedParamListAddInt(params, dom->state.state, "state.state");
+    virTypedParamListAddInt(params, dom->state.reason, "state.reason");
 
     return 0;
 }
@@ -9810,24 +9807,17 @@ testDomainGetStatsIOThread(virDomainObj *dom,
         return 0;
     }
 
-    if (virTypedParamListAddUInt(params, niothreads, "iothread.count") < 0)
-        return -1;
+    virTypedParamListAddUInt(params, niothreads, "iothread.count");
 
     for (i = 0; i < niothreads; i++) {
         testIOThreadInfo iothread = g_array_index(priv->iothreads,
                                                   testIOThreadInfo, i);
-        if (virTypedParamListAddULLong(params, iothread.poll_max_ns,
-                                       "iothread.%u.poll-max-ns",
-                                       iothread.iothread_id) < 0)
-            return -1;
-        if (virTypedParamListAddUInt(params, iothread.poll_grow,
-                                     "iothread.%u.poll-grow",
-                                     iothread.iothread_id) < 0)
-            return -1;
-        if (virTypedParamListAddUInt(params, iothread.poll_shrink,
-                                     "iothread.%u.poll-shrink",
-                                     iothread.iothread_id) < 0)
-            return -1;
+        virTypedParamListAddULLong(params, iothread.poll_max_ns,
+                                   "iothread.%u.poll-max-ns", iothread.iothread_id);
+        virTypedParamListAddUInt(params, iothread.poll_grow,
+                                 "iothread.%u.poll-grow", iothread.iothread_id);
+        virTypedParamListAddUInt(params, iothread.poll_shrink,
+                                 "iothread.%u.poll-shrink", iothread.iothread_id);
     }
 
     return 0;
diff --git a/src/util/virtypedparam.c b/src/util/virtypedparam.c
index d3057f49ad..abd5f4cd0e 100644
--- a/src/util/virtypedparam.c
+++ b/src/util/virtypedparam.c
@@ -852,7 +852,7 @@ virTypedParamListExtend(virTypedParamList *list)
 }
 
 
-int
+void
 virTypedParamListAddInt(virTypedParamList *list,
                         int value,
                         const char *namefmt,
@@ -866,12 +866,10 @@ virTypedParamListAddInt(virTypedParamList *list,
     va_start(ap, namefmt);
     virTypedParamSetNameVPrintf(list, par, namefmt, ap);
     va_end(ap);
-
-    return 0;
 }
 
 
-int
+void
 virTypedParamListAddUInt(virTypedParamList *list,
                          unsigned int value,
                          const char *namefmt,
@@ -885,12 +883,10 @@ virTypedParamListAddUInt(virTypedParamList *list,
     va_start(ap, namefmt);
     virTypedParamSetNameVPrintf(list, par, namefmt, ap);
     va_end(ap);
-
-    return 0;
 }
 
 
-int
+void
 virTypedParamListAddLLong(virTypedParamList *list,
                           long long value,
                           const char *namefmt,
@@ -904,12 +900,10 @@ virTypedParamListAddLLong(virTypedParamList *list,
     va_start(ap, namefmt);
     virTypedParamSetNameVPrintf(list, par, namefmt, ap);
     va_end(ap);
-
-    return 0;
 }
 
 
-int
+void
 virTypedParamListAddULLong(virTypedParamList *list,
                            unsigned long long value,
                            const char *namefmt,
@@ -923,12 +917,10 @@ virTypedParamListAddULLong(virTypedParamList *list,
     va_start(ap, namefmt);
     virTypedParamSetNameVPrintf(list, par, namefmt, ap);
     va_end(ap);
-
-    return 0;
 }
 
 
-int
+void
 virTypedParamListAddString(virTypedParamList *list,
                            const char *value,
                            const char *namefmt,
@@ -942,12 +934,10 @@ virTypedParamListAddString(virTypedParamList *list,
     va_start(ap, namefmt);
     virTypedParamSetNameVPrintf(list, par, namefmt, ap);
     va_end(ap);
-
-    return 0;
 }
 
 
-int
+void
 virTypedParamListAddBoolean(virTypedParamList *list,
                             bool value,
                             const char *namefmt,
@@ -961,12 +951,10 @@ virTypedParamListAddBoolean(virTypedParamList *list,
     va_start(ap, namefmt);
     virTypedParamSetNameVPrintf(list, par, namefmt, ap);
     va_end(ap);
-
-    return 0;
 }
 
 
-int
+void
 virTypedParamListAddDouble(virTypedParamList *list,
                            double value,
                            const char *namefmt,
@@ -980,6 +968,4 @@ virTypedParamListAddDouble(virTypedParamList *list,
     va_start(ap, namefmt);
     virTypedParamSetNameVPrintf(list, par, namefmt, ap);
     va_end(ap);
-
-    return 0;
 }
diff --git a/src/util/virtypedparam.h b/src/util/virtypedparam.h
index b2869173e1..7065683297 100644
--- a/src/util/virtypedparam.h
+++ b/src/util/virtypedparam.h
@@ -162,45 +162,45 @@ void
 virTypedParamListConcat(virTypedParamList *to,
                         virTypedParamList **fromptr);
 
-int
+void
 virTypedParamListAddInt(virTypedParamList *list,
                         int value,
                         const char *namefmt,
                         ...)
-    G_GNUC_PRINTF(3, 4) G_GNUC_WARN_UNUSED_RESULT;
-int
+    G_GNUC_PRINTF(3, 4);
+void
 virTypedParamListAddUInt(virTypedParamList *list,
                          unsigned int value,
                          const char *namefmt,
                          ...)
-    G_GNUC_PRINTF(3, 4) G_GNUC_WARN_UNUSED_RESULT;
-int
+    G_GNUC_PRINTF(3, 4);
+void
 virTypedParamListAddLLong(virTypedParamList *list,
                           long long value,
                           const char *namefmt,
                           ...)
-    G_GNUC_PRINTF(3, 4) G_GNUC_WARN_UNUSED_RESULT;
-int
+    G_GNUC_PRINTF(3, 4);
+void
 virTypedParamListAddULLong(virTypedParamList *list,
                            unsigned long long value,
                            const char *namefmt,
                            ...)
-    G_GNUC_PRINTF(3, 4) G_GNUC_WARN_UNUSED_RESULT;
-int
+    G_GNUC_PRINTF(3, 4);
+void
 virTypedParamListAddString(virTypedParamList *list,
                            const char *value,
                            const char *namefmt,
                            ...)
-    G_GNUC_PRINTF(3, 4) G_GNUC_WARN_UNUSED_RESULT;
-int
+    G_GNUC_PRINTF(3, 4);
+void
 virTypedParamListAddBoolean(virTypedParamList *list,
                             bool value,
                             const char *namefmt,
                             ...)
-    G_GNUC_PRINTF(3, 4) G_GNUC_WARN_UNUSED_RESULT;
-int
+    G_GNUC_PRINTF(3, 4);
+void
 virTypedParamListAddDouble(virTypedParamList *list,
                            double value,
                            const char *namefmt,
                            ...)
-    G_GNUC_PRINTF(3, 4) G_GNUC_WARN_UNUSED_RESULT;
+    G_GNUC_PRINTF(3, 4);