linux-kernel - [PATCH v2] ASoC: mediatek: mt8173-rt5650: Fix refcount leak in mt8173_rt5650_dev

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Date:   Fri,  3 Jun 2022 16:42:41 +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>,
        Tzung-Bi Shih <tzungbi@...gle.com>,
        Akihiko Odaki <akihiko.odaki@...il.com>,
        Miaoqian Lin <linmq006@...il.com>,
        Jiaxin Yu <jiaxin.yu@...iatek.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        PC Liao <pc.liao@...iatek.com>,
        Nicolas Boichat <drinkcat@...omium.org>,
        Koro Chen <koro.chen@...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 v2] ASoC: mediatek: mt8173-rt5650: Fix refcount leak in mt8173_rt5650_dev_probe

of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Fix refcount leak in some error paths.

Fixes: 0f83f9296d5c ("ASoC: mediatek: Add machine driver for ALC5650 codec")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
- update fixes tag.
v1 Link: https://lore.kernel.org/r/20220603081308.1332-1-linmq006@gmail.com
---
 sound/soc/mediatek/mt8173/mt8173-rt5650.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/sound/soc/mediatek/mt8173/mt8173-rt5650.c b/sound/soc/mediatek/mt8173/mt8173-rt5650.c
index d1c94acb4516..e05f2b0231fe 100644
--- a/sound/soc/mediatek/mt8173/mt8173-rt5650.c
+++ b/sound/soc/mediatek/mt8173/mt8173-rt5650.c
@@ -280,7 +280,8 @@ static int mt8173_rt5650_dev_probe(struct platform_device *pdev)
 	if (!mt8173_rt5650_dais[DAI_LINK_CODEC_I2S].codecs[0].of_node) {
 		dev_err(&pdev->dev,
 			"Property 'audio-codec' missing or invalid\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto put_platform_node;
 	}
 	mt8173_rt5650_dais[DAI_LINK_CODEC_I2S].codecs[1].of_node =
 		mt8173_rt5650_dais[DAI_LINK_CODEC_I2S].codecs[0].of_node;
@@ -293,7 +294,7 @@ static int mt8173_rt5650_dev_probe(struct platform_device *pdev)
 			dev_err(&pdev->dev,
 				"%s codec_capture_dai name fail %d\n",
 				__func__, ret);
-			return ret;
+			goto put_platform_node;
 		}
 		mt8173_rt5650_dais[DAI_LINK_CODEC_I2S].codecs[1].dai_name =
 			codec_capture_dai;
@@ -315,12 +316,14 @@ static int mt8173_rt5650_dev_probe(struct platform_device *pdev)
 	if (!mt8173_rt5650_dais[DAI_LINK_HDMI_I2S].codecs->of_node) {
 		dev_err(&pdev->dev,
 			"Property 'audio-codec' missing or invalid\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto put_platform_node;
 	}
 	card->dev = &pdev->dev;
 
 	ret = devm_snd_soc_register_card(&pdev->dev, card);
 
+put_platform_node:
 	of_node_put(platform_node);
 	return ret;
 }
-- 
2.25.1