linux-kernel - [PATCH] ASoC: mt6797-mt6351: Fix refcount leak in mt6797_mt6351_dev

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Message-Id: <20220603122149.25117-1-linmq006@gmail.com>
Date:   Fri,  3 Jun 2022 16:21:47 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Miaoqian Lin <linmq006@...il.com>,
        Kai Chieh Chuang <kaichieh.chuang@...iatek.com>,
        alsa-devel@...a-project.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: mt6797-mt6351: Fix refcount leak in mt6797_mt6351_dev_probe

of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

Fixes: f0ab0bf250da ("ASoC: add mt6797-mt6351 driver and config option")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
changes in v2:
- update Fixes tag
v1 link: https://lore.kernel.org/r/20220603083417.9011-1-linmq006@gmail.com/
---
 sound/soc/mediatek/mt6797/mt6797-mt6351.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/soc/mediatek/mt6797/mt6797-mt6351.c b/sound/soc/mediatek/mt6797/mt6797-mt6351.c
index 496f32bcfb5e..d2f6213a6bfc 100644
--- a/sound/soc/mediatek/mt6797/mt6797-mt6351.c
+++ b/sound/soc/mediatek/mt6797/mt6797-mt6351.c
@@ -217,7 +217,8 @@ static int mt6797_mt6351_dev_probe(struct platform_device *pdev)
 	if (!codec_node) {
 		dev_err(&pdev->dev,
 			"Property 'audio-codec' missing or invalid\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto put_platform_node;
 	}
 	for_each_card_prelinks(card, i, dai_link) {
 		if (dai_link->codecs->name)
@@ -230,6 +231,9 @@ static int mt6797_mt6351_dev_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
 			__func__, ret);
 
+	of_node_put(codec_node);
+put_platform_node:
+	of_node_put(platform_node);
 	return ret;
 }
 
-- 
2.25.1