Added esp_spp_vfs_unregister() to free memory allocated by esp_spp_vfs_register()

components/bt/host/bluedroid/api/include/api/esp_spp_api.h

@@ -90,6 +90,8 @@ typedef enum {
     ESP_SPP_WRITE_EVT                   = 33,               /*!< When SPP write operation completes, the event comes, only for ESP_SPP_MODE_CB */
     ESP_SPP_SRV_OPEN_EVT                = 34,               /*!< When SPP Server connection open, the event comes */
     ESP_SPP_SRV_STOP_EVT                = 35,               /*!< When SPP server stopped, the event comes */
+    ESP_SPP_VFS_REGISTER_EVT            = 36,               /*!< When SPP VFS register, the event comes */
+    ESP_SPP_VFS_UNREGISTER_EVT          = 37,               /*!< When SPP VFS unregister, the event comes */
 } esp_spp_cb_event_t;
 
 
@@ -208,6 +210,20 @@ typedef union {
         uint32_t            handle;         /*!< The connection handle */
         bool                cong;           /*!< TRUE, congested. FALSE, uncongested */
     } cong;                                 /*!< SPP callback param of ESP_SPP_CONG_EVT */
+
+    /**
+     * @brief ESP_SPP_VFS_REGISTER_EVT
+     */
+    struct spp_vfs_register_evt_param {
+        esp_spp_status_t    status;         /*!< status */
+    } vfs_register;                         /*!< SPP callback param of ESP_SPP_VFS_REGISTER_EVT */
+
+    /**
+     * @brief ESP_SPP_VFS_UNREGISTER_EVT
+     */
+    struct spp_vfs_unregister_evt_param {
+        esp_spp_status_t    status;         /*!< status */
+    } vfs_unregister;                       /*!< SPP callback param of ESP_SPP_VFS_UNREGISTER_EVT */
 } esp_spp_cb_param_t;                       /*!< SPP callback parameter union type */
 
 /**
@@ -388,6 +404,8 @@ esp_err_t esp_spp_write(uint32_t handle, int len, uint8_t *p_data);
 /**
  * @brief       This function is used to register VFS.
  *              For now, SPP only supports write, read and close.
+ *              When the operation is completed, the callback function will be called with ESP_SPP_VFS_REGISTER_EVT.
+ *              This function must be called after esp_spp_init()/esp_spp_enhanced_init() successful and before esp_spp_deinit().
  *
  * @return
  *              - ESP_OK: success
@@ -395,6 +413,17 @@ esp_err_t esp_spp_write(uint32_t handle, int len, uint8_t *p_data);
  */
 esp_err_t esp_spp_vfs_register(void);
 
+/**
+ * @brief       This function is used to unregister VFS.
+ *              When the operation is completed, the callback function will be called with ESP_SPP_VFS_UNREGISTER_EVT.
+ *              This function must be called after esp_spp_vfs_register() successful and before esp_spp_deinit().
+ *
+ * @return
+ *              - ESP_OK: success
+ *              - other: failed
+ */
+esp_err_t esp_spp_vfs_unregister(void);
+
 #ifdef __cplusplus
 }
 #endif