[PATCH] fix: sound/soc/samsung: aries_audio_probe: double of_node_put due to direct assignment without of_node_get

[WenTao Liang]

In aries_audio_probe(), aries_dai[0].platforms->of_node is assigned the
same pointer as aries_dai[0].cpus->of_node (from of_parse_phandle)
without calling of_node_get(). When the sound card is deregistered, the
ASoC framework calls of_node_put() on both cpus->of_node and
platforms->of_node, causing a double put on the same node and a refcount
underflow.

Add of_node_get(aries_dai[0].cpus->of_node) before the assignment.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 7a3a7671fa6c ("ASoC: samsung: Add driver for Aries boards")
Signed-off-by: WenTao Liang <vulab@xxxxxxxxxxx>
---
 sound/soc/samsung/aries_wm8994.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/samsung/aries_wm8994.c b/sound/soc/samsung/aries_wm8994.c
index 48ccc1d1854b..6db91b73f25c 100644
--- a/sound/soc/samsung/aries_wm8994.c
+++ b/sound/soc/samsung/aries_wm8994.c
@@ -658,6 +658,7 @@ static int aries_audio_probe(struct platform_device *pdev)
 		goto out;
 	}
 
+	of_node_get(aries_dai[0].cpus->of_node);
 	aries_dai[0].platforms->of_node = aries_dai[0].cpus->of_node;
 
 	/* Set CPU of_node for BT DAI */
-- 
2.39.5 (Apple Git-154)