[PATCH 3/3] ASoC: SOF: sof-audio: skip prepare/unprepare if swidget is NULL

[Peter Ujfalusi <peter.ujfalusi@linux.intel.com>]

From: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

Skip preparing/unpreparing widgets if the swidget pointer is NULL. This
will be true in the case of virtual widgets in topology that were added
for reusing the legacy HDA machine driver with SOF.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
---
 sound/soc/sof/sof-audio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/sof/sof-audio.c b/sound/soc/sof/sof-audio.c
index 721de96fdb83..5c878788dedb 100644
--- a/sound/soc/sof/sof-audio.c
+++ b/sound/soc/sof/sof-audio.c
@@ -274,7 +274,7 @@ sof_unprepare_widgets_in_path(struct snd_sof_dev *sdev, struct snd_soc_dapm_widg
 	struct snd_soc_dapm_path *p;
 
 	/* skip if the widget is in use or if it is already unprepared */
-	if (!swidget->prepared || swidget->use_count > 0)
+	if (!swidget || !swidget->prepared || swidget->use_count > 0)
 		goto sink_unprepare;
 
 	widget_ops = tplg_ops ? tplg_ops->widget : NULL;
@@ -311,7 +311,7 @@ sof_prepare_widgets_in_path(struct snd_sof_dev *sdev, struct snd_soc_dapm_widget
 	if (!widget_ops)
 		return 0;
 
-	if (!widget_ops[widget->id].ipc_prepare || swidget->prepared)
+	if (!swidget || !widget_ops[widget->id].ipc_prepare || swidget->prepared)
 		goto sink_prepare;
 
 	/* prepare the source widget */
-- 
2.39.0