fixup! fix(log_router): ensure mutex is created successfully, or else return an error

Author: Vincent-Dalstra

components/utilities/log_router/log_router.c

@@ -286,11 +286,13 @@ static void esp_log_router_shutdown(void)
 
 esp_err_t esp_log_router_to_file(const char* file_path, const char* tag, esp_log_level_t level)
 {
-    // Create mutex for thread safety
-    g_log_router_mutex = xSemaphoreCreateMutex();
+    // Create mutex for thread safety, the first time we ran
     if (g_log_router_mutex == NULL) {
-        ESP_LOGW(TAG, "Failed to create mutex for log router");
-        return ESP_ERR_NO_MEM;
+        g_log_router_mutex = xSemaphoreCreateMutex();
+        if (g_log_router_mutex == NULL) {
+            ESP_LOGE(TAG, "Failed to create mutex for log router");
+            return ESP_ERR_NO_MEM;
+        }
     }
 
     if (!file_path) {