linux-kernel - [PATCH] ASoC: mediatek: mt8195: Fix error handling in mt8195_mt6359_rt1019_rt5682_dev

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Date:   Wed, 16 Mar 2022 08:46:15 +0000
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>,
        Trevor Wu <trevor.wu@...iatek.com>,
        Tzung-Bi Shih <tzungbi@...gle.com>,
        YC Hung <yc.hung@...iatek.com>,
        Rikard Falkeborn <rikard.falkeborn@...il.com>,
        Miaoqian Lin <linmq006@...il.com>,
        Bixuan Cui <cuibixuan@...wei.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: mediatek: mt8195: Fix error handling in mt8195_mt6359_rt1019_rt5682_dev_probe

The device_node pointer is returned by of_parse_phandle()  with refcount
incremented. We should use of_node_put() on it when done.

This function only calls of_node_put() in the regular path.
And it will cause refcount leak in error path.

Fixes: 082482a50227 ("ASoC: mediatek: mt8195: release device_node after snd_soc_register_card")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.c b/sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.c
index 29c2d3407cc7..e3146311722f 100644
--- a/sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.c
+++ b/sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.c
@@ -1342,7 +1342,8 @@ static int mt8195_mt6359_rt1019_rt5682_dev_probe(struct platform_device *pdev)
 					      "mediatek,dai-link");
 		if (ret) {
 			dev_dbg(&pdev->dev, "Parse dai-link fail\n");
-			return -EINVAL;
+			ret = -EINVAL;
+			goto put_node;
 		}
 	} else {
 		if (!sof_on)
@@ -1398,6 +1399,7 @@ static int mt8195_mt6359_rt1019_rt5682_dev_probe(struct platform_device *pdev)
 
 	ret = devm_snd_soc_register_card(&pdev->dev, card);
 
+put_node:
 	of_node_put(platform_node);
 	of_node_put(adsp_node);
 	of_node_put(dp_node);
-- 
2.17.1