ASoC: SOF: topology: dynamically allocate and store DAI widget->private

For dspless mode, we need to allocate and store an 'sdai'
structure. The existing code allocate the data on the stack and does
not set the widget->private pointer.

This minor change should not have any impact on existing DAIs, even
when the DSP is used.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://msgid.link/r/20240213101247.28887-10-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/sof-audio.c

@@ -46,7 +46,6 @@ static int sof_widget_free_unlocked(struct snd_sof_dev *sdev,
 {
 	const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
 	struct snd_sof_pipeline *spipe = swidget->spipe;
-	struct snd_sof_widget *pipe_widget;
 	int err = 0;
 	int ret;
 
@@ -59,8 +58,6 @@ static int sof_widget_free_unlocked(struct snd_sof_dev *sdev,
 	if (--swidget->use_count)
 		return 0;
 
-	pipe_widget = swidget->spipe->pipe_widget;
-
 	/* reset route setup status for all routes that contain this widget */
 	sof_reset_route_setup_status(sdev, swidget);
 
@@ -109,8 +106,9 @@ static int sof_widget_free_unlocked(struct snd_sof_dev *sdev,
 	 * free the scheduler widget (same as pipe_widget) associated with the current swidget.
 	 * skip for static pipelines
 	 */
-	if (swidget->dynamic_pipeline_widget && swidget->id != snd_soc_dapm_scheduler) {
-		ret = sof_widget_free_unlocked(sdev, pipe_widget);
+	if (swidget->spipe && swidget->dynamic_pipeline_widget &&
+	    swidget->id != snd_soc_dapm_scheduler) {
+		ret = sof_widget_free_unlocked(sdev, swidget->spipe->pipe_widget);
 		if (ret < 0 && !err)
 			err = ret;
 	}

sound/soc/sof/topology.c

@@ -2356,23 +2356,29 @@ static int sof_dspless_widget_ready(struct snd_soc_component *scomp, int index,
 	if (WIDGET_IS_DAI(w->id)) {
 		struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
 		struct snd_sof_widget *swidget;
-		struct snd_sof_dai dai;
+		struct snd_sof_dai *sdai;
 		int ret;
 
 		swidget = kzalloc(sizeof(*swidget), GFP_KERNEL);
 		if (!swidget)
 			return -ENOMEM;
 
-		memset(&dai, 0, sizeof(dai));
+		sdai = kzalloc(sizeof(*sdai), GFP_KERNEL);
+		if (!sdai) {
+			kfree(swidget);
+			return -ENOMEM;
+		}
 
-		ret = sof_connect_dai_widget(scomp, w, tw, &dai);
+		ret = sof_connect_dai_widget(scomp, w, tw, sdai);
 		if (ret) {
 			kfree(swidget);
+			kfree(sdai);
 			return ret;
 		}
 
 		swidget->scomp = scomp;
 		swidget->widget = w;
+		swidget->private = sdai;
 		mutex_init(&swidget->setup_mutex);
 		w->dobj.private = swidget;
 		list_add(&swidget->list, &sdev->widget_list);
@@ -2396,6 +2402,7 @@ static int sof_dspless_widget_unload(struct snd_soc_component *scomp,
 
 		/* remove and free swidget object */
 		list_del(&swidget->list);
+		kfree(swidget->private);
 		kfree(swidget);
 	}