diff --git a/support/platform/src/adc/adc_core.c b/support/platform/src/adc/adc_core.c
index 19750530..771ef304 100644
--- a/support/platform/src/adc/adc_core.c
+++ b/support/platform/src/adc/adc_core.c
@@ -178,7 +178,7 @@ static struct AdcDevice *AdcManagerFindDevice(uint32_t number)
     struct AdcDevice *device = NULL;
     struct AdcManager *manager = g_adcManager;
 
-    if (number < 0 || number >= ADC_DEVICES_MAX) {
+    if (number >= ADC_DEVICES_MAX) {
         HDF_LOGE("%s: invalid devNum:%u", __func__, number);
         return NULL;
     }
@@ -320,7 +320,7 @@ static int32_t AdcManagerIoOpen(struct HdfSBuf *data, struct HdfSBuf *reply)
         return HDF_ERR_IO;
     }
 
-    if (number < 0 || number >= ADC_DEVICES_MAX || reply == NULL) {
+    if (number >= ADC_DEVICES_MAX || reply == NULL) {
         HDF_LOGE("%s: invalid number!", __func__);
         return HDF_ERR_INVALID_PARAM;
     }
@@ -354,7 +354,7 @@ static int32_t AdcManagerIoClose(struct HdfSBuf *data, struct HdfSBuf *reply)
     }
 
     number = (uint32_t)(number - ADC_HANDLE_SHIFT);
-    if (number < 0 || number >= ADC_DEVICES_MAX) {
+    if (number >= ADC_DEVICES_MAX) {
         HDF_LOGE("%s: get device %u failed", __func__, number);
         return HDF_ERR_INVALID_PARAM;
     }
diff --git a/support/platform/src/dac/dac_core.c b/support/platform/src/dac/dac_core.c
index ec928683..1a1d37b0 100644
--- a/support/platform/src/dac/dac_core.c
+++ b/support/platform/src/dac/dac_core.c
@@ -145,7 +145,7 @@ static struct DacDevice *DacManagerFindDevice(uint32_t number)
     struct DacDevice *device = NULL;
     struct DacManager *manager = g_dacManager;
 
-    if (number < 0 || number >= DAC_DEVICES_MAX) {
+    if (number >= DAC_DEVICES_MAX) {
         HDF_LOGE("%s: invalid devNum:%u", __func__, number);
         return NULL;
     }
@@ -334,7 +334,7 @@ static int32_t DacManagerIoOpen(struct HdfSBuf *data, struct HdfSBuf *reply)
         return HDF_ERR_IO;
     }
 
-    if (number < 0 || number >= DAC_DEVICES_MAX || reply == NULL) {
+    if (number >= DAC_DEVICES_MAX || reply == NULL) {
         HDF_LOGE("%s: invalid number %u", __func__, number);
         return HDF_ERR_INVALID_PARAM;
     }
@@ -367,7 +367,7 @@ static int32_t DacManagerIoClose(struct HdfSBuf *data, struct HdfSBuf *reply)
     }
 
     number  = (uint32_t)(number - DAC_HANDLE_SHIFT);
-    if (number < 0 || number >= DAC_DEVICES_MAX) {
+    if (number >= DAC_DEVICES_MAX) {
         HDF_LOGE("%s: invalid number %u", __func__, number);
         return HDF_ERR_INVALID_PARAM;
     }
@@ -394,7 +394,7 @@ static int32_t DacManagerIoWrite(struct HdfSBuf *data, struct HdfSBuf *reply)
     }
 
     number  = (uint32_t)(number - DAC_HANDLE_SHIFT);
-    if (number < 0 || number >= DAC_DEVICES_MAX) {
+    if (number >= DAC_DEVICES_MAX) {
         HDF_LOGE("%s: invalid number %u", __func__, number);
         return HDF_ERR_INVALID_PARAM;
     }
diff --git a/support/platform/src/gpio/gpio_service.c b/support/platform/src/gpio/gpio_service.c
index ecb8fa40..289b6a01 100644
--- a/support/platform/src/gpio/gpio_service.c
+++ b/support/platform/src/gpio/gpio_service.c
@@ -50,8 +50,9 @@ static int32_t GpioServiceIoWrite(struct HdfSBuf *data, struct HdfSBuf *reply)
     uint16_t gpio;
     uint16_t value;
 
-    if (data == NULL || reply == NULL) {
-        HDF_LOGE("%s: data or reply is NULL", __func__);
+    (void)reply;
+    if (data == NULL) {
+        HDF_LOGE("%s: data is NULL", __func__);
     }
 
     if (!HdfSbufReadUint16(data, &gpio)) {
@@ -109,8 +110,9 @@ static int32_t GpioServiceIoSetDir(struct HdfSBuf *data, struct HdfSBuf *reply)
     uint16_t gpio;
     uint16_t dir;
 
-    if (data == NULL || reply == NULL) {
-        HDF_LOGE("%s: data or reply is NULL", __func__);
+    (void)reply;
+    if (data == NULL) {
+        HDF_LOGE("%s: data is NULL", __func__);
         return HDF_ERR_INVALID_PARAM;
     }
 
@@ -138,8 +140,9 @@ static int32_t GpioServiceIoSetIrq(struct HdfSBuf *data, struct HdfSBuf *reply)
     uint16_t gpio;
     uint16_t mode;
 
-    if (data == NULL || reply == NULL) {
-        HDF_LOGE("%s: data or reply is NULL", __func__);
+    (void)reply;
+    if (data == NULL) {
+        HDF_LOGE("%s: data is NULL", __func__);
         return HDF_ERR_INVALID_PARAM;
     }
 
@@ -159,8 +162,8 @@ static int32_t GpioServiceIoSetIrq(struct HdfSBuf *data, struct HdfSBuf *reply)
 static int32_t GpioServiceIoUnsetIrq(struct HdfSBuf *data, struct HdfSBuf *reply)
 {
     uint16_t gpio;
-    (void)reply;
 
+    (void)reply;
     if (data == NULL) {
         HDF_LOGE("%s: data is NULL", __func__);
         return HDF_ERR_INVALID_PARAM;
@@ -178,8 +181,8 @@ static int32_t GpioServiceIoEnableIrq(struct HdfSBuf *data, struct HdfSBuf *repl
 {
     int32_t ret;
     uint16_t gpio;
-    (void)reply;
 
+    (void)reply;
     if (data == NULL) {
         HDF_LOGE("%s: data is NULL", __func__);
         return HDF_ERR_INVALID_PARAM;
@@ -203,8 +206,8 @@ static int32_t GpioServiceIoDisableIrq(struct HdfSBuf *data, struct HdfSBuf *rep
 {
     int32_t ret;
     uint16_t gpio;
-    (void)reply;
 
+    (void)reply;
     if (data == NULL) {
         HDF_LOGE("%s: data is NULL", __func__);
         return HDF_ERR_INVALID_PARAM;
diff --git a/support/platform/src/hdmi/hdmi_ncts.c b/support/platform/src/hdmi/hdmi_ncts.c
index 53a0a916..23c179f4 100644
--- a/support/platform/src/hdmi/hdmi_ncts.c
+++ b/support/platform/src/hdmi/hdmi_ncts.c
@@ -15,7 +15,7 @@
 #define HDMI_NCTS_INVALID_VALUE 0xffffffff
 
 /*
- * see hdmi1.4 table 7-1、7-2、7-3.
+ * see hdmi1.4 table 7-1, 7-2, 7-3.
  * The exact relationship: 128 * fs = tmdsClock * N / CTS.
  */
 static struct HdmiAudioNCts g_audioNctsMap[] = {
diff --git a/support/platform/src/i3c/i3c_core.c b/support/platform/src/i3c/i3c_core.c
index e8dc70ae..3391ea1c 100644
--- a/support/platform/src/i3c/i3c_core.c
+++ b/support/platform/src/i3c/i3c_core.c
@@ -680,6 +680,7 @@ int32_t I3cCntlrIbiCallback(struct I3cDevice *device)
 
     if (device->ibi->ibiFunc == NULL) {
         HDF_LOGW("%s: device->ibi or ibiFunc is NULL!", __func__);
+        OsalMemFree(ibiData);
         return HDF_ERR_NOT_SUPPORT;
     }
 
diff --git a/support/platform/src/rtc/rtc_core.c b/support/platform/src/rtc/rtc_core.c
index 37a0c960..2da1a0e3 100644
--- a/support/platform/src/rtc/rtc_core.c
+++ b/support/platform/src/rtc/rtc_core.c
@@ -203,11 +203,13 @@ struct RtcHost *RtcHostCreate(struct HdfDeviceObject *device)
 
 void RtcHostDestroy(struct RtcHost *host)
 {
-    if (host != NULL) {
-        host->device = NULL;
-        host->method = NULL;
-        host->data = NULL;
+    if (host == NULL) {
+        HDF_LOGE("%s: host is NULL!", __func__);
         return;
     }
+
+    host->device = NULL;
+    host->method = NULL;
+    host->data = NULL;
     OsalMemFree(host);
-}
\ No newline at end of file
+}
diff --git a/support/platform/src/rtc/rtc_if_u.c b/support/platform/src/rtc/rtc_if_u.c
index fcc3ebd7..8b232f04 100644
--- a/support/platform/src/rtc/rtc_if_u.c
+++ b/support/platform/src/rtc/rtc_if_u.c
@@ -15,45 +15,33 @@
 
 #define HDF_LOG_TAG rtc_if_u_c
 
-static void RtcPutObjByPointer(const void *obj)
-{
-    if (obj == NULL) {
-        return;
-    }
-    HdfIoServiceRecycle((struct HdfIoService *)obj);
-};
-
 DevHandle RtcOpen()
 {
-    void *host = NULL;
+    struct HdfIoService *service = NULL;
 
-    host = HdfIoServiceBind("HDF_PLATFORM_RTC");
-    if (host == NULL) {
+    service = HdfIoServiceBind("HDF_PLATFORM_RTC");
+    if (service == NULL) {
         HDF_LOGE("%s: rtc service bind fail", __func__);
         return NULL;
     }
 
-    return (DevHandle)host;
+    return (DevHandle)service;
 }
 
 void RtcClose(DevHandle handle)
 {
-    struct RtcHost *host = NULL;
- 
     if (handle == NULL) {
         HDF_LOGE("%s: handle is NULL", __func__);
         return;
     }
 
-    host = (struct RtcHost *)handle;
-    RtcPutObjByPointer(host);
+    HdfIoServiceRecycle((struct HdfIoService *)handle);
 }
 
 int32_t RtcReadTime(DevHandle handle, struct RtcTime *time)
 {
     int32_t ret;
     uint32_t len = 0;
-    struct RtcHost *host = NULL;
     struct HdfSBuf *reply = NULL;
     struct HdfIoService *service = NULL;
     struct RtcTime *temp = NULL;
@@ -63,15 +51,13 @@ int32_t RtcReadTime(DevHandle handle, struct RtcTime *time)
         return HDF_ERR_INVALID_OBJECT;
     }
 
-    host = (struct RtcHost *)handle;
-
     reply = HdfSbufObtainDefaultSize();
     if (reply == NULL) {
         HDF_LOGE("%s: fail to obtain reply!", __func__);
         return HDF_ERR_MALLOC_FAIL;
     }
 
-    service = (struct HdfIoService *)host;
+    service = (struct HdfIoService *)handle;
     if (service == NULL || service->dispatcher == NULL || service->dispatcher->Dispatch == NULL) {
         HDF_LOGE("%s: service is invalid", __func__);
         ret = HDF_ERR_MALLOC_FAIL;
@@ -110,7 +96,6 @@ EXIT:
 int32_t RtcWriteTime(DevHandle handle, const struct RtcTime *time)
 {
     int32_t ret;
-    struct RtcHost *host = NULL;
     struct HdfSBuf *data = NULL;
     struct HdfIoService *service = NULL;
 
@@ -119,8 +104,6 @@ int32_t RtcWriteTime(DevHandle handle, const struct RtcTime *time)
         return HDF_ERR_INVALID_OBJECT;
     }
 
-    host = (struct RtcHost *)handle;
-
     data = HdfSbufObtainDefaultSize();
     if (data == NULL) {
         HDF_LOGE("%s: fail to obtain data", __func__);
@@ -133,7 +116,7 @@ int32_t RtcWriteTime(DevHandle handle, const struct RtcTime *time)
         return HDF_ERR_IO;
     }
 
-    service = (struct HdfIoService *)host;
+    service = (struct HdfIoService *)handle;
     if (service == NULL || service->dispatcher == NULL || service->dispatcher->Dispatch == NULL) {
         HDF_LOGE("%s: service is invalid", __func__);
         HdfSbufRecycle(data);
@@ -155,7 +138,6 @@ int32_t RtcReadAlarm(DevHandle handle, enum RtcAlarmIndex alarmIndex, struct Rtc
 {
     int32_t ret;
     uint32_t len = 0;
-    struct RtcHost *host = NULL;
     struct HdfSBuf *data = NULL;
     struct HdfSBuf *reply = NULL;
     struct RtcTime *temp = NULL;
@@ -166,8 +148,6 @@ int32_t RtcReadAlarm(DevHandle handle, enum RtcAlarmIndex alarmIndex, struct Rtc
         return HDF_ERR_INVALID_OBJECT;
     }
 
-    host = (struct RtcHost *)handle;
-
     data = HdfSbufObtainDefaultSize();
     if (data == NULL) {
         HDF_LOGE("%s: fail to obtain data", __func__);
@@ -187,7 +167,7 @@ int32_t RtcReadAlarm(DevHandle handle, enum RtcAlarmIndex alarmIndex, struct Rtc
         goto EXIT;
     }
 
-    service = (struct HdfIoService *)host;
+    service = (struct HdfIoService *)handle;
     if (service == NULL || service->dispatcher == NULL || service->dispatcher->Dispatch == NULL) {
         HDF_LOGE("%s: service is invalid", __func__);
         ret = HDF_ERR_MALLOC_FAIL;
@@ -227,7 +207,6 @@ EXIT:
 int32_t RtcWriteAlarm(DevHandle handle, enum RtcAlarmIndex alarmIndex, const struct RtcTime *time)
 {
     int32_t ret;
-    struct RtcHost *host = NULL;
     struct HdfSBuf *data = NULL;
     struct HdfIoService *service = NULL;
 
@@ -236,8 +215,6 @@ int32_t RtcWriteAlarm(DevHandle handle, enum RtcAlarmIndex alarmIndex, const str
         return HDF_ERR_INVALID_OBJECT;
     }
 
-    host = (struct RtcHost *)handle;
-
     data = HdfSbufObtainDefaultSize();
     if (data == NULL) {
         HDF_LOGE("%s: fail to obtain data", __func__);
@@ -256,7 +233,7 @@ int32_t RtcWriteAlarm(DevHandle handle, enum RtcAlarmIndex alarmIndex, const str
         return HDF_ERR_IO;
     }
 
-    service = (struct HdfIoService *)host;
+    service = (struct HdfIoService *)handle;
     if (service == NULL || service->dispatcher == NULL || service->dispatcher->Dispatch == NULL) {
         HDF_LOGE("%s: service is invalid", __func__);
         HdfSbufRecycle(data);
@@ -288,7 +265,6 @@ int32_t RtcRegisterAlarmCallback(DevHandle handle, enum RtcAlarmIndex alarmIndex
 int32_t RtcAlarmInterruptEnable(DevHandle handle, enum RtcAlarmIndex alarmIndex, uint8_t enable)
 {
     int32_t ret;
-    struct RtcHost *host = NULL;
     struct HdfSBuf *data = NULL;
     struct HdfIoService *service = NULL;
 
@@ -297,8 +273,6 @@ int32_t RtcAlarmInterruptEnable(DevHandle handle, enum RtcAlarmIndex alarmIndex,
         return HDF_ERR_INVALID_OBJECT;
     }
 
-    host = (struct RtcHost *)handle;
-
     data = HdfSbufObtainDefaultSize();
     if (data == NULL) {
         HDF_LOGE("%s: fail to obtain data", __func__);
@@ -317,7 +291,7 @@ int32_t RtcAlarmInterruptEnable(DevHandle handle, enum RtcAlarmIndex alarmIndex,
         return HDF_ERR_IO;
     }
 
-    service = (struct HdfIoService *)host;
+    service = (struct HdfIoService *)handle;
     if (service == NULL || service->dispatcher == NULL || service->dispatcher->Dispatch == NULL) {
         HDF_LOGE("%s: service is invalid", __func__);
         HdfSbufRecycle(data);
@@ -338,7 +312,6 @@ int32_t RtcAlarmInterruptEnable(DevHandle handle, enum RtcAlarmIndex alarmIndex,
 int32_t RtcGetFreq(DevHandle handle, uint32_t *freq)
 {
     int32_t ret;
-    struct RtcHost *host = NULL;
     struct HdfSBuf *reply = NULL;
     struct HdfIoService *service = NULL;
 
@@ -347,15 +320,13 @@ int32_t RtcGetFreq(DevHandle handle, uint32_t *freq)
         return HDF_ERR_INVALID_OBJECT;
     }
 
-    host = (struct RtcHost *)handle;
-
     reply = HdfSbufObtainDefaultSize();
     if (reply == NULL) {
         HDF_LOGE("%s: fail to obtain data", __func__);
         return HDF_ERR_MALLOC_FAIL;
     }
 
-    service = (struct HdfIoService *)host;
+    service = (struct HdfIoService *)handle;
     if (service == NULL || service->dispatcher == NULL || service->dispatcher->Dispatch == NULL) {
         HDF_LOGE("%s: service is invalid", __func__);
         ret = HDF_ERR_MALLOC_FAIL;
@@ -381,7 +352,6 @@ EXIT:
 int32_t RtcSetFreq(DevHandle handle, uint32_t freq)
 {
     int32_t ret;
-    struct RtcHost *host = NULL;
     struct HdfSBuf *data = NULL;
     struct HdfIoService *service = NULL;
 
@@ -390,8 +360,6 @@ int32_t RtcSetFreq(DevHandle handle, uint32_t freq)
         return HDF_ERR_INVALID_OBJECT;
     }
 
-    host = (struct RtcHost *)handle;
-
     data = HdfSbufObtainDefaultSize();
     if (data == NULL) {
         HDF_LOGE("%s: fail to obtain data", __func__);
@@ -404,7 +372,7 @@ int32_t RtcSetFreq(DevHandle handle, uint32_t freq)
         return HDF_ERR_IO;
     }
 
-    service = (struct HdfIoService *)host;
+    service = (struct HdfIoService *)handle;
     if (service == NULL || service->dispatcher == NULL || service->dispatcher->Dispatch == NULL) {
         HDF_LOGE("%s: service is invalid", __func__);
         HdfSbufRecycle(data);
@@ -425,7 +393,6 @@ int32_t RtcSetFreq(DevHandle handle, uint32_t freq)
 int32_t RtcReset(DevHandle handle)
 {
     int32_t ret;
-    struct RtcHost *host = NULL;
     struct HdfIoService *service = NULL;
 
     if (handle == NULL) {
@@ -433,9 +400,7 @@ int32_t RtcReset(DevHandle handle)
         return HDF_ERR_INVALID_OBJECT;
     }
 
-    host = (struct RtcHost *)handle;
-
-    service = (struct HdfIoService *)host;
+    service = (struct HdfIoService *)handle;
     if (service->dispatcher == NULL || service->dispatcher->Dispatch == NULL) {
         HDF_LOGE("%s: service is invalid", __func__);
         return HDF_ERR_INVALID_PARAM;
@@ -453,7 +418,6 @@ int32_t RtcReset(DevHandle handle)
 int32_t RtcReadReg(DevHandle handle, uint8_t usrDefIndex, uint8_t *value)
 {
     int32_t ret;
-    struct RtcHost *host = NULL;
     struct HdfSBuf *data = NULL;
     struct HdfSBuf *reply = NULL;
     struct HdfIoService *service = NULL;
@@ -463,8 +427,6 @@ int32_t RtcReadReg(DevHandle handle, uint8_t usrDefIndex, uint8_t *value)
         return HDF_ERR_INVALID_OBJECT;
     }
 
-    host = (struct RtcHost *)handle;
-
     data = HdfSbufObtainDefaultSize();
     if (data == NULL) {
         HDF_LOGE("%s: fail to obtain data", __func__);
@@ -484,7 +446,7 @@ int32_t RtcReadReg(DevHandle handle, uint8_t usrDefIndex, uint8_t *value)
         goto EXIT;
     }
 
-    service = (struct HdfIoService *)host;
+    service = (struct HdfIoService *)handle;
     if (service == NULL || service->dispatcher == NULL || service->dispatcher->Dispatch == NULL) {
         HDF_LOGE("%s: service is invalid", __func__);
         ret = HDF_ERR_MALLOC_FAIL;
@@ -512,7 +474,6 @@ EXIT:
 int32_t RtcWriteReg(DevHandle handle, uint8_t usrDefIndex, uint8_t value)
 {
     int32_t ret;
-    struct RtcHost *host = NULL;
     struct HdfSBuf *data = NULL;
     struct HdfIoService *service = NULL;
 
@@ -521,8 +482,6 @@ int32_t RtcWriteReg(DevHandle handle, uint8_t usrDefIndex, uint8_t value)
         return HDF_ERR_INVALID_OBJECT;
     }
 
-    host = (struct RtcHost *)handle;
-
     data = HdfSbufObtainDefaultSize();
     if (data == NULL) {
         HDF_LOGE("%s: fail to obtain data", __func__);
@@ -541,7 +500,7 @@ int32_t RtcWriteReg(DevHandle handle, uint8_t usrDefIndex, uint8_t value)
         return HDF_ERR_IO;
     }
 
-    service = (struct HdfIoService *)host;
+    service = (struct HdfIoService *)handle;
     if (service == NULL || service->dispatcher == NULL || service->dispatcher->Dispatch == NULL) {
         HDF_LOGE("%s: service is invalid", __func__);
         HdfSbufRecycle(data);