diff --git a/src/app_centraldirectory.c b/src/app_centraldirectory.c
index 1879058992306a8695fab91188099e4523b4a7bd..f691e5550693c59ca262ab3630bd9ef0bc3b4f6d 100755
--- a/src/app_centraldirectory.c
+++ b/src/app_centraldirectory.c
@@ -38,7 +38,6 @@ void HapPutByte(const HapBuf *hapBuffer, int offset, char value)
     if ((offset >= 0) && (hapBuffer->len - offset >= (int)(sizeof(value)))) {
         *(char *)((char *)hapBuffer->buffer + offset) = value;
     }
-    return;
 }
 
 void HapPutData(const HapBuf *hapBuffer, int offset, const unsigned char *data, int len)
@@ -65,7 +64,6 @@ void HapSetInt32(const HapBuf *buffer, int offset, int value)
     if ((offset >= 0) && ((buffer->len - offset) >= (int)(sizeof(value)))) {
         HapPutInt32((unsigned char *)buffer->buffer + offset, buffer->len - offset, (int)(value));
     }
-    return;
 }
 
 bool CreateHapBuffer(HapBuf *hapBuffer, int len)
diff --git a/src/app_common.c b/src/app_common.c
index 1d4a2460bac7650c88fd134ae4fb2395ff5e0688..f129fe0c656d80232026c836dcb0c5c2bc22dc13 100755
--- a/src/app_common.c
+++ b/src/app_common.c
@@ -72,5 +72,4 @@ void HapPutInt32(unsigned char *buf, int len, int value)
         buf[i] = var;
         var = var >> (BYTE_BITS);
     }
-    return;
 }
diff --git a/src/app_provision.c b/src/app_provision.c
index 5ac534f9aa43f44e271be05f6200a844f550f4c8..eb91aa8b9fb402723455675e61708264943eacc2 100755
--- a/src/app_provision.c
+++ b/src/app_provision.c
@@ -27,9 +27,7 @@ static void ProfInit(ProfileProf *pf)
     int ret = memset_s(pf, sizeof(ProfileProf), 0, sizeof(ProfileProf));
     if (ret != V_OK) {
         LOG_ERROR("memset failed");
-        return;
     }
-    return;
 }
 
 static char *GetStringTag(const cJSON *root, const char *tag)
@@ -69,7 +67,6 @@ static void FreeStringAttay(char **array, int num)
         }
     }
     APPV_FREE(array);
-    return;
 }
 
 static char **GetStringArrayTag(const cJSON *root, const char *tag, int *numReturn)
@@ -238,7 +235,6 @@ static void FreeProfPerssion(ProfPermission *pfval)
     FreeStringAttay(pfval->restricPermission, pfval->restricNum);
     pfval->restricNum = 0;
     pfval->restricPermission = NULL;
-    return;
 }
 
 static void FreeProfDebuginfo(ProfDebugInfo *pfval)
@@ -248,8 +244,6 @@ static void FreeProfDebuginfo(ProfDebugInfo *pfval)
     FreeStringAttay(pfval->deviceId, pfval->devidNum);
     pfval->devidNum = 0;
     pfval->deviceId = NULL;
-
-    return;
 }
 
 void ProfFreeData(ProfileProf *pf)
@@ -266,7 +260,6 @@ void ProfFreeData(ProfileProf *pf)
     FreeProfDebuginfo(&pf->debugInfo);
     FREE_IF_NOT_NULL(pf->issuer);
     FREE_IF_NOT_NULL(pf->appid);
-    return;
 }
 
 /* parse profile */
diff --git a/src/app_verify.c b/src/app_verify.c
index 91cde0858e15ce426a752b92f729b079dc3466b9..afe1f7714405f98471e8ce1f1c223134b075b16d 100755
--- a/src/app_verify.c
+++ b/src/app_verify.c
@@ -82,7 +82,6 @@ static void SignHeadN2H(HwSignHead *signHead)
     signHead->magicLow = HapGetInt64((unsigned char *)&signHead->magicLow, sizeof(signHead->magicLow));
     signHead->magicHigh = HapGetInt64((unsigned char *)&signHead->magicHigh, sizeof(signHead->magicHigh));
     signHead->version = HapGetInt((unsigned char *)&signHead->version, sizeof(signHead->version));
-    return;
 }
 
 static void BlockHeadN2H(BlockHead *blockHead)
@@ -90,7 +89,6 @@ static void BlockHeadN2H(BlockHead *blockHead)
     blockHead->type = HapGetInt((unsigned char *)&blockHead->type, sizeof(blockHead->type));
     blockHead->length = HapGetInt((unsigned char *)&blockHead->length, sizeof(blockHead->length));
     blockHead->offset = HapGetInt((unsigned char *)&blockHead->offset, sizeof(blockHead->offset));
-    return;
 }
 
 static void ContentN2H(ContentInfo *content)
@@ -99,7 +97,6 @@ static void ContentN2H(ContentInfo *content)
     content->size = HapGetInt((unsigned char *)&content->size, sizeof(content->size));
     content->algId = HapGetInt((unsigned char *)&content->algId, sizeof(content->algId));
     content->length = HapGetInt((unsigned char *)&content->length, sizeof(content->length));
-    return;
 }
 
 static int GetSignHead(const FileRead *file, SignatureInfo *signInfo)
@@ -235,7 +232,6 @@ int CalculateHash(const unsigned char *input, int len, int hashAlg, unsigned cha
     int ret = mbedtls_md(mbedtls_md_info_from_type((mbedtls_md_type_t)hashAlg), input, len, output);
     if (ret) {
         LOG_ERROR("Error: calc digest failed");
-        return ret;
     }
     return ret;
 }
@@ -535,6 +531,7 @@ EXIT:
     APPV_FREE(profileData);
     return V_ERR;
 }
+
 static unsigned char *GetRsaPk(const mbedtls_pk_context *pk, int *len)
 {
     unsigned char *buf = APPV_MALLOC(MAX_PK_BUF);
@@ -673,7 +670,6 @@ static void FreeAppSignPublicKey(AppSignPk *pk)
     if (pk->pk != NULL) {
         APPV_FREE(pk->pk);
     }
-    return;
 }
 
 int GetAppid(ProfileProf *profile)
diff --git a/src/mbedtls_pkcs7.c b/src/mbedtls_pkcs7.c
index 90895c6cd9b7adae1a894efed470304ffdce3d0c..afe5f6eaa330f7886b43fb19edae965fa5ffde53 100755
--- a/src/mbedtls_pkcs7.c
+++ b/src/mbedtls_pkcs7.c
@@ -683,7 +683,6 @@ static void FreeSignedDataCerts(Pkcs7 *pkcs7)
 static void FreeSignedDataCrl(Pkcs7 *pkcs7)
 {
     mbedtls_x509_crl_free(&pkcs7->signedData.crl);
-    return;
 }
 
 static int GetCertsNumOfSignedData(const mbedtls_x509_crt *crts)
@@ -1316,5 +1315,4 @@ void PKCS7_FreeRes(Pkcs7 *pkcs7)
     FreeSignedDataCerts(pkcs7);
     FreeSignedDataCrl(pkcs7);
     UnLoadRootCert();
-    return;
 }