fix(openthread): remove the empty task for openthread tasklets

components/openthread/src/esp_openthread_task_queue.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -15,6 +15,7 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/portmacro.h"
 #include "freertos/queue.h"
+#include "openthread/tasklet.h"
 
 static QueueHandle_t s_task_queue = NULL;
 static int s_task_queue_event_fd = -1;
@@ -37,6 +38,14 @@ esp_err_t esp_openthread_task_queue_init(const esp_openthread_platform_config_t
                                                      &esp_openthread_task_queue_process, task_queue_workflow);
 }
 
+void otTaskletsSignalPending(otInstance *aInstance)
+{
+    uint64_t val = 1;
+    ssize_t ret;
+    ret = write(s_task_queue_event_fd, &val, sizeof(val));
+    assert(ret == sizeof(val));
+}
+
 esp_err_t IRAM_ATTR esp_openthread_task_queue_post(esp_openthread_task_t task, void *arg)
 {
     task_storage_t task_storage = {