[PATCH v2] ASoC: SOF: Fix potential NULL pointer dereference

[Amadeusz Sławiński]

Cleanup path for sof_prepare_widgets_in_path() should check if unprepare
callback exists before calling it, instead it checks if it does not
exist. Fix the check.

Fixes: 66344c6d9211 ("ASoC: SOF: Add a prepare op to IPC topology widget ops")
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski at linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>

---

v2 : Fix Fixes hash, apparently I looked at wrong tree

---
 sound/soc/sof/sof-audio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/sof/sof-audio.c b/sound/soc/sof/sof-audio.c
index 8d740635a4bb..28976098a89e 100644
--- a/sound/soc/sof/sof-audio.c
+++ b/sound/soc/sof/sof-audio.c
@@ -318,7 +318,7 @@ sof_prepare_widgets_in_path(struct snd_sof_dev *sdev, struct snd_soc_dapm_widget
 			p->walking = false;
 			if (ret < 0) {
 				/* unprepare the source widget */
-				if (!widget_ops[widget->id].ipc_unprepare && swidget->prepared) {
+				if (widget_ops[widget->id].ipc_unprepare && swidget->prepared) {
 					widget_ops[widget->id].ipc_unprepare(swidget);
 					swidget->prepared = false;
 				}
-- 
2.25.1