[PATCH 5.17 0404/1126] ASoC: mediatek: mt8192-mt6359: Fix error handling in mt8192_mt6359_dev_probe

Greg Kroah-Hartman
2022-04-05T08:20:59Z

From: Miaoqian Lin <linmq006@gmail.com>

[ Upstream commit e45ac7831ff3e2934d58cce319c17c8ec763c95c ]

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 paths.
Fix this by calling of_node_put() in error handling too.

Fixes: 4e28491a7a19 ("ASoC: mediatek: mt8192-mt6359: fix device_node leak")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20220308015224.23585-1-linmq006@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../mt8192/mt8192-mt6359-rt1015-rt5682.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c b/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c
index f7daad1bfe1e..ee91569c0911 100644
--- a/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c
+++ b/sound/soc/mediatek/mt8192/mt8192-mt6359-rt1015-rt5682.c
@@ -1116,8 +1116,10 @@ static int mt8192_mt6359_dev_probe(struct platform_device *pdev)
}

card = (struct snd_soc_card *)of_device_get_match_data(&pdev->dev);
- if (!card)
- return -EINVAL;
+ if (!card) {
+ ret = -EINVAL;
+ goto put_platform_node;
+ }
card->dev = &pdev->dev;

hdmi_codec = of_parse_phandle(pdev->dev.of_node,
@@ -1159,20 +1161,24 @@ static int mt8192_mt6359_dev_probe(struct platform_device *pdev)
}

priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
+ if (!priv) {
+ ret = -ENOMEM;
+ goto put_hdmi_codec;
+ }
snd_soc_card_set_drvdata(card, priv);

ret = mt8192_afe_gpio_init(&pdev->dev);
if (ret) {
dev_err(&pdev->dev, "init gpio error %d\n", ret);
- return ret;
+ goto put_hdmi_codec;
}

ret = devm_snd_soc_register_card(&pdev->dev, card);

- of_node_put(platform_node);
+put_hdmi_codec:
of_node_put(hdmi_codec);
+put_platform_node:
+ of_node_put(platform_node);
return ret;
}

--
2.34.1