diff --git a/hievent/src/hiview_hievent.c b/hievent/src/hiview_hievent.c
index 60e87072dc08c54d586ad913c4717bc76823d9e8..f5be146a74754b8c5c87f897fe27de8c0d083e18 100644
--- a/hievent/src/hiview_hievent.c
+++ b/hievent/src/hiview_hievent.c
@@ -482,15 +482,15 @@ static int HiviewHieventWriteLogException(char *str, const int strlen)
         if (leftBufLen > EVENT_INFO_PACK_BUF_LEN) {
             tempchr = strptr[EVENT_INFO_PACK_BUF_LEN - 1];
             strptr[EVENT_INFO_PACK_BUF_LEN - 1] = '\0';
-            LogBufToException(0, 0, IDAP_LOGTYPE_CMD, 1,
-                              strptr, EVENT_INFO_PACK_BUF_LEN);
+            (void)LogBufToException(0, 0, IDAP_LOGTYPE_CMD, 1,
+                                    strptr, EVENT_INFO_PACK_BUF_LEN);
             leftBufLen -= (EVENT_INFO_PACK_BUF_LEN - 1);
             strptr += (EVENT_INFO_PACK_BUF_LEN - 1);
             strptr[0] = tempchr;
             sentcnt++;
         } else {
-            LogBufToException(0, 0, IDAP_LOGTYPE_CMD, 0,
-                              strptr, leftBufLen);
+            (void)LogBufToException(0, 0, IDAP_LOGTYPE_CMD, 0,
+                                    strptr, leftBufLen);
             sentcnt++;
             break;
         }
@@ -548,6 +548,6 @@ void HiviewHieventFlush(void)
 {
     // magic number 0x7BBE69BD for notify hiview to flush hievent file
     struct HiviewHievent *hievent = HiviewHieventCreate(0x7BBE69BD);
-    HiviewHieventReport(hievent);
+    (void)HiviewHieventReport(hievent);
     HiviewHieventDestroy(hievent);
 }
diff --git a/tzdriver/src/smc_smp.c b/tzdriver/src/smc_smp.c
index 1f6800ddb18fadd23e4bf9b612b0f3eb834d56dd..2bc6111b28edaffd7225c83867ac708e7cdfdc60 100644
--- a/tzdriver/src/smc_smp.c
+++ b/tzdriver/src/smc_smp.c
@@ -704,10 +704,6 @@ static uint32_t SendSmcCmd(uint32_t cmd, paddr_t cmdAddr,
     register uint32_t r1 asm("r1") = cmdAddr;
     register uint32_t r2 asm("r2") = cmdType;
     register uint32_t r3 asm("r3") = 0;
-    (void)r0;
-    (void)r1;
-    (void)r2;
-    (void)r3;
     do {
         __asm__ volatile(
             ".ifnc %0, r0;.err;.endif;\n"
@@ -742,7 +738,7 @@ int RawSmcSend(uint32_t cmd, paddr_t cmdAddr,
 
 void SiqDump(paddr_t mode)
 {
-    RawSmcSend(TSP_REE_SIQ, mode, 0, false);
+    (void)RawSmcSend(TSP_REE_SIQ, mode, 0, false);
     DoCmdNeedArchivelog();
 }
 
@@ -1016,7 +1012,7 @@ void FiqShadowWorkFunc(uint64_t target)
 {
     SmcCmdRetT secret = { SMC_EXIT_MAX, 0, target };
 
-    SmpSmcSend(TSP_REQUEST, SMC_OPS_START_FIQSHD, GetCurrentPid(),
+    (void)SmpSmcSend(TSP_REQUEST, SMC_OPS_START_FIQSHD, GetCurrentPid(),
         &secret, false);
     return;
 }
@@ -1430,7 +1426,7 @@ int TcNsSmcWithNoNr(TcNsSmcCmd *cmd)
 
 static void SmcWorkNoWait(uint32_t type)
 {
-    RawSmcSend(TSP_REQUEST, g_cmdPhys, type, true);
+    (void)RawSmcSend(TSP_REQUEST, g_cmdPhys, type, true);
 }
 
 static void SmcWorkSetCmdBuffer(struct work_struct *work)
diff --git a/tzdriver/src/tc_client_sub_driver.c b/tzdriver/src/tc_client_sub_driver.c
index b29ff633605cc1d2de0d19806fa4f5f5353684b6..e2fd6e1321775a8f1f1aefe6ddf6f739cdd52f49 100644
--- a/tzdriver/src/tc_client_sub_driver.c
+++ b/tzdriver/src/tc_client_sub_driver.c
@@ -679,20 +679,21 @@ void DelServiceFromDev(TcNsDevFile *dev, TcNsService *service)
         return;
     }
     for (i = 0; i < SERVICES_MAX_COUNT; i++) {
-        if (dev->services[i] == service) {
-            tlogd("dev->serviceRef[%u] = %u\n", i, dev->serviceRef[i]);
-            if (dev->serviceRef[i] == 0) {
-                tloge("Caution! No service to be deleted!\n");
-                break;
-            }
-            dev->serviceRef[i]--;
-            if (!dev->serviceRef[i]) {
-                tlogd("del service %u from %u\n", i, dev->devFileId);
-                dev->services[i] = NULL;
-                PutServiceStruct(service);
-            }
+        if (dev->services[i] != service) {
+            continue;
+        }
+        tlogd("dev->serviceRef[%u] = %u\n", i, dev->serviceRef[i]);
+        if (dev->serviceRef[i] == 0) {
+            tloge("Caution! No service to be deleted!\n");
             break;
         }
+        dev->serviceRef[i]--;
+        if (!dev->serviceRef[i]) {
+            tlogd("del service %u from %u\n", i, dev->devFileId);
+            dev->services[i] = NULL;
+            PutServiceStruct(service);
+        }
+        break;
     }
 }
 
diff --git a/tzdriver/src/tz_spi_notify.c b/tzdriver/src/tz_spi_notify.c
index 21a74486a9b873b9f54141b85baf77de0bc8983c..b0ce55a8f06e5d773f0b22b0cd2778a07671506d 100644
--- a/tzdriver/src/tz_spi_notify.c
+++ b/tzdriver/src/tz_spi_notify.c
@@ -150,23 +150,25 @@ static DECLARE_WORK(tc_notify_work, TcNotifyFn);
 static struct workqueue_struct *g_tzSpiWq = NULL;
 #endif
 
+static void WalkCallback(struct NotifyContextTimer *tcNotifyDataTimer, struct TcNsCallback *callbackFuncT)
+{
+    if (tcNotifyDataTimer->property.timerClass == TIMER_RTC) {
+        tlogd("start to call callback func\n");
+        callbackFuncT->callbackFunc((void *)(&(tcNotifyDataTimer->property)));
+        tlogd("end to call callback func\n");
+    } else if (tcNotifyDataTimer->property.timerClass == TIMER_GENERIC) {
+        tlogd("timer60 no callback func\n");
+    }
+}
+
 static void WalkCallbackList(struct NotifyContextTimer *tcNotifyDataTimer)
 {
     struct TcNsCallback *callbackFuncT = NULL;
 
     mutex_lock(&g_taCallbackFuncList.callbackListLock);
-    list_for_each_entry(callbackFuncT,
-        &g_taCallbackFuncList.callbackList, head) {
-        if (memcmp(callbackFuncT->uuid, tcNotifyDataTimer->uuid,
-            UUID_SIZE) == 0) {
-            if (tcNotifyDataTimer->property.timerClass == TIMER_RTC) {
-                tlogd("start to call callback func\n");
-                callbackFuncT->callbackFunc(
-                    (void *)(&(tcNotifyDataTimer->property)));
-                tlogd("end to call callback func\n");
-            } else if (tcNotifyDataTimer->property.timerClass == TIMER_GENERIC) {
-                tlogd("timer60 no callback func\n");
-            }
+    list_for_each_entry(callbackFuncT, &g_taCallbackFuncList.callbackList, head) {
+        if (memcmp(callbackFuncT->uuid, tcNotifyDataTimer->uuid, UUID_SIZE) == 0) {
+            WalkCallback(tcNotifyDataTimer, callbackFuncT);
         }
     }
     mutex_unlock(&g_taCallbackFuncList.callbackListLock);