On 11/12/25 01:24, Ma Ke wrote:

@@ -454,6 +454,11 @@ static void *etm_setup_aux(struct perf_event *event, void **pages, goto err; out:

• if (user_sink) {

• put_device(&user_sink->dev);
  

• user_sink = NULL;
  

• }

After searched kernel, I prefer to put device in coresight_get_sink_by_id(). Please refer acpi_dev_present() how to do that.

I would like Suzuki's confirmation in case I introduce noise.

Thanks, Leo