diff --git a/adapter/khdf/linux/platform/uart/uart_adapter.c b/adapter/khdf/linux/platform/uart/uart_adapter.c
index e8bac7820b35197d2d6ac5e951adebd3ad9bb754..60ef6253b5954abf5aceec69b1e8d8628ffe43b3 100644
--- a/adapter/khdf/linux/platform/uart/uart_adapter.c
+++ b/adapter/khdf/linux/platform/uart/uart_adapter.c
@@ -29,24 +29,21 @@
 #include "securec.h"
 #include "uart_if.h"
 #include "uart_core.h"
-
-#define HDF_LOG_TAG hdf_uart_adapter
-#define UART_NAME_LEN 20
-#define UART_PATHNAME_LEN (UART_NAME_LEN + 20)
-
-static char g_driverName[UART_NAME_LEN];
+#include "uart_adapter.h"
 
 static int32_t UartAdapterInit(struct UartHost *host)
 {
     char name[UART_PATHNAME_LEN] = {0};
     struct file *fp = NULL;
+    struct UartPriv *uartpriv = NULL;
     mm_segment_t oldfs;
 
     if (host == NULL) {
         HDF_LOGE("UartAdapterInit: host is null!");
         return HDF_ERR_INVALID_OBJECT;
     }
-    if (sprintf_s(name, UART_PATHNAME_LEN - 1, "/dev/%s%d", g_driverName, host->num) < 0) {
+    uartpriv = (struct UartPriv *)host->priv;
+    if (sprintf_s(name, UART_PATHNAME_LEN - 1, "/dev/%s%d", uartpriv->driverName, host->num) < 0) {
         return HDF_FAILURE;
     }
     oldfs = get_fs();
@@ -58,27 +55,29 @@ static int32_t UartAdapterInit(struct UartHost *host)
         return HDF_FAILURE;
     }
     set_fs(oldfs);
-    host->priv = fp;
+    uartpriv->fiLp = fp;
     return HDF_SUCCESS;
 }
 
 static int32_t UartAdapterDeInit(struct UartHost *host)
 {
     struct file *fp = NULL;
+    struct UartPriv *uartpriv = NULL;
     mm_segment_t oldfs;
 
     if (host == NULL) {
         HDF_LOGE("UartAdapterDeInit: host is null!");
         return HDF_ERR_INVALID_OBJECT;
     }
-    fp = (struct file *)host->priv;
+    uartpriv = (struct UartPriv *)host->priv;
+    fp = uartpriv->fiLp;
     oldfs = get_fs();
     set_fs(KERNEL_DS);
     if (!IS_ERR(fp) && fp) {
         filp_close(fp, NULL);
     }
     set_fs(oldfs);
-    host->priv = NULL;
+    uartpriv->fiLp = NULL;
     return HDF_SUCCESS;
 }
 
@@ -87,6 +86,7 @@ static int32_t UartAdapterRead(struct UartHost *host, uint8_t *data, uint32_t si
     loff_t pos = 0;
     int ret;
     struct file *fp = NULL;
+    struct UartPriv *uartpriv;
     char *p = (char *)data;
     mm_segment_t oldfs;
     uint32_t tmp = 0;
@@ -96,7 +96,8 @@ static int32_t UartAdapterRead(struct UartHost *host, uint8_t *data, uint32_t si
         return HDF_ERR_INVALID_OBJECT;
     }
 
-    fp = (struct file *)host->priv;
+    uartpriv = (struct UartPriv *)host->priv;
+    fp = uartpriv->fiLp;
     oldfs = get_fs();
     set_fs(KERNEL_DS);
     while (size >= tmp) {
@@ -116,6 +117,7 @@ static int32_t UartAdapterWrite(struct UartHost *host, uint8_t *data, uint32_t s
     loff_t pos = 0;
     int ret;
     struct file *fp = NULL;
+    struct UartPriv *uartpriv;
     char *p = (char *)data;
     mm_segment_t oldfs;
 
@@ -124,7 +126,8 @@ static int32_t UartAdapterWrite(struct UartHost *host, uint8_t *data, uint32_t s
         return HDF_ERR_INVALID_OBJECT;
     }
 
-    fp = (struct file *)host->priv;
+    uartpriv = (struct UartPriv *)host->priv;
+    fp = uartpriv->fiLp;
     oldfs = get_fs();
     set_fs(KERNEL_DS);
     ret = vfs_write(fp, p, size, &pos);
@@ -210,12 +213,14 @@ static int32_t UartAdapterGetBaud(struct UartHost *host, uint32_t *baudRate)
 {
     struct termios termios;
     struct file *fp = NULL;
+    struct UartPriv *uartpriv;
 
     if (host == NULL) {
         HDF_LOGE("UartAdapterGetBaud: host is null!");
         return HDF_ERR_INVALID_OBJECT;
     }
-    fp = (struct file *)host->priv;
+    uartpriv = (struct UartPriv *)host->priv;
+    fp = uartpriv->fiLp;
     if (baudRate == NULL) {
         HDF_LOGE("UartAdapterGetBaud: baudRate is null!");
         return HDF_ERR_INVALID_PARAM;
@@ -283,13 +288,15 @@ static int32_t UartAdapterSetBaud(struct UartHost *host, uint32_t baudRate)
     struct termios termios;
     struct serial_struct serial;
     struct file *fp = NULL;
+    struct UartPriv *uartpriv;
     int ret;
 
     if (host == NULL) {
         HDF_LOGE("UartAdapterSetBaud: host is null!");
         return HDF_ERR_INVALID_OBJECT;
     }
-    fp = (struct file *)host->priv;
+    uartpriv = (struct UartPriv *)host->priv;
+    fp = uartpriv->fiLp;
 
     if (UartAdapterIoctlInner(fp, TCGETS, (unsigned long)&termios) < 0) {
         HDF_LOGE("UartAdapterSetBaud: tcgets fail!");
@@ -381,13 +388,15 @@ static int32_t UartAdapterGetAttribute(struct UartHost *host, struct UartAttribu
 {
     struct termios termios;
     struct file *fp = NULL;
+    struct UartPriv *uartpriv;
     int ret;
 
     if (host == NULL) {
         HDF_LOGE("UartAdapterGetAttribute: host is null!");
         return HDF_ERR_INVALID_OBJECT;
     }
-    fp = (struct file *)host->priv;
+    uartpriv = (struct UartPriv *)host->priv;
+    fp = uartpriv->fiLp;
     if (attribute == NULL) {
         HDF_LOGE("UartAdapterGetAttribute: attribute is null!");
         return HDF_ERR_INVALID_PARAM;
@@ -409,13 +418,15 @@ static int32_t UartAdapterSetAttribute(struct UartHost *host, struct UartAttribu
 {
     struct termios termios;
     struct file *fp = NULL;
+    struct UartPriv *uartpriv;
     int ret;
 
     if (host == NULL) {
         HDF_LOGE("UartAdapterSetAttribute: host is null!");
         return HDF_ERR_INVALID_OBJECT;
     }
-    fp = (struct file *)host->priv;
+    uartpriv = (struct UartPriv *)host->priv;
+    fp = uartpriv->fiLp;
     if (attribute == NULL) {
         HDF_LOGE("UartAdapterSetAttribute: attribute is null!");
         return HDF_ERR_INVALID_PARAM;
@@ -485,6 +496,7 @@ static int32_t HdfUartInit(struct HdfDeviceObject *obj)
     struct DeviceResourceIface *iface = NULL;
     struct UartHost *host = NULL;
     const char *drName = NULL;
+    struct UartPriv *uartpriv;
 
     HDF_LOGI("HdfUartInit: entry!");
     if (obj == NULL) {
@@ -510,17 +522,21 @@ static int32_t HdfUartInit(struct HdfDeviceObject *obj)
         HDF_LOGE("HdfUartInit: read driver_name fail!");
         return HDF_FAILURE;
     }
-    g_driverName[UART_NAME_LEN - 1] = 0;
     if (strlen(drName) > (UART_NAME_LEN - 1)) {
         HDF_LOGE("HdfUartInit: illegal length of drName!");
         return HDF_FAILURE;
     }
-    ret = memcpy_s(g_driverName, UART_NAME_LEN, drName, strlen(drName));
-    if (ret != EOK) {
-        HDF_LOGE("HdfUartInit: memcpy_s fail!");
+    uartpriv = OsalMemCalloc(sizeof(struct UartPriv));
+    if (uartpriv == NULL) {
+        HDF_LOGE("HdfUartInit: malloc UartPriv fail!");
+        return HDF_FAILURE;
+    }
+    if (memcpy_s(uartpriv->driverName, UART_NAME_LEN, drName, strlen(drName)) < 0) {
+        HDF_LOGE("HdfUartInit: memcpy_s drName fail!");
         return HDF_FAILURE;
     }
     host->method = &g_uartHostMethod;
+    host->priv = uartpriv;
     return HDF_SUCCESS;
 }
 
@@ -534,6 +550,7 @@ static void HdfUartRelease(struct HdfDeviceObject *obj)
         return;
     }
     host = UartHostFromDevice(obj);
+    OsalMemFree(host->priv);
     UartHostDestroy(host);
 }
 
diff --git a/framework/support/platform/include/uart/uart_core.h b/framework/support/platform/include/uart/uart_core.h
index 6ff2d9e112f6b1b24bc1e6a6db644bffe7beb6f6..a6d44afd0f7ecff0ab784cf7f1c5ab02fe8b5444 100644
--- a/framework/support/platform/include/uart/uart_core.h
+++ b/framework/support/platform/include/uart/uart_core.h
@@ -19,6 +19,17 @@
 extern "C" {
 #endif /* __cplusplus */
 
+
+#define HDF_LOG_TAG hdf_uart_adapter
+#define UART_NAME_LEN 20
+#define UART_PATHNAME_LEN (UART_NAME_LEN + 20)
+/**
+ * @brief UartPriv.
+ */
+typedef struct {
+    struct file *fiLp;
+    char   driverName[UART_NAME_LEN];
+} UartPriv;
 /**
  * @brief uart device operations.
  */