linux-kernel - [PATCH] ASoC: ti: j721e-evm: Fix refcount leak in j721e_soc_probe

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Message-Id: <20220512111331.44774-1-linmq006@gmail.com>
Date:   Thu, 12 May 2022 15:13:30 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Peter Ujfalusi <peter.ujfalusi@...il.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] ASoC: ti: j721e-evm: Fix refcount leak in j721e_soc_probe_*

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

Fixes: 6748d0559059 ("ASoC: ti: Add custom machine driver for j721e EVM (CPB and IVI)")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 sound/soc/ti/j721e-evm.c | 44 ++++++++++++++++++++++++++++++----------
 1 file changed, 33 insertions(+), 11 deletions(-)

diff --git a/sound/soc/ti/j721e-evm.c b/sound/soc/ti/j721e-evm.c
index 4077e15ec48b..6a969874c927 100644
--- a/sound/soc/ti/j721e-evm.c
+++ b/sound/soc/ti/j721e-evm.c
@@ -630,17 +630,18 @@ static int j721e_soc_probe_cpb(struct j721e_priv *priv, int *link_idx,
 	codec_node = of_parse_phandle(node, "ti,cpb-codec", 0);
 	if (!codec_node) {
 		dev_err(priv->dev, "CPB codec node is not provided\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto put_dai_node;
 	}
 
 	domain = &priv->audio_domains[J721E_AUDIO_DOMAIN_CPB];
 	ret = j721e_get_clocks(priv->dev, &domain->codec, "cpb-codec-scki");
 	if (ret)
-		return ret;
+		goto put_codec_node;
 
 	ret = j721e_get_clocks(priv->dev, &domain->mcasp, "cpb-mcasp-auxclk");
 	if (ret)
-		return ret;
+		goto put_codec_node;
 
 	/*
 	 * Common Processor Board, two links
@@ -650,8 +651,10 @@ static int j721e_soc_probe_cpb(struct j721e_priv *priv, int *link_idx,
 	comp_count = 6;
 	compnent = devm_kzalloc(priv->dev, comp_count * sizeof(*compnent),
 				GFP_KERNEL);
-	if (!compnent)
-		return -ENOMEM;
+	if (!compnent) {
+		ret = -ENOMEM;
+		goto put_codec_node;
+	}
 
 	comp_idx = 0;
 	priv->dai_links[*link_idx].cpus = &compnent[comp_idx++];
@@ -702,6 +705,12 @@ static int j721e_soc_probe_cpb(struct j721e_priv *priv, int *link_idx,
 	(*conf_idx)++;
 
 	return 0;
+
+put_codec_node:
+	of_node_put(codec_node);
+put_dai_node:
+	of_node_put(dai_node);
+	return ret;
 }
 
 static int j721e_soc_probe_ivi(struct j721e_priv *priv, int *link_idx,
@@ -726,23 +735,25 @@ static int j721e_soc_probe_ivi(struct j721e_priv *priv, int *link_idx,
 	codeca_node = of_parse_phandle(node, "ti,ivi-codec-a", 0);
 	if (!codeca_node) {
 		dev_err(priv->dev, "IVI codec-a node is not provided\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto put_dai_node;
 	}
 
 	codecb_node = of_parse_phandle(node, "ti,ivi-codec-b", 0);
 	if (!codecb_node) {
 		dev_warn(priv->dev, "IVI codec-b node is not provided\n");
-		return 0;
+		ret = 0;
+		goto put_codeca_node;
 	}
 
 	domain = &priv->audio_domains[J721E_AUDIO_DOMAIN_IVI];
 	ret = j721e_get_clocks(priv->dev, &domain->codec, "ivi-codec-scki");
 	if (ret)
-		return ret;
+		goto put_codecb_node;
 
 	ret = j721e_get_clocks(priv->dev, &domain->mcasp, "ivi-mcasp-auxclk");
 	if (ret)
-		return ret;
+		goto put_codecb_node;
 
 	/*
 	 * IVI extension, two links
@@ -754,8 +765,10 @@ static int j721e_soc_probe_ivi(struct j721e_priv *priv, int *link_idx,
 	comp_count = 8;
 	compnent = devm_kzalloc(priv->dev, comp_count * sizeof(*compnent),
 				GFP_KERNEL);
-	if (!compnent)
-		return -ENOMEM;
+	if (!compnent) {
+		ret = -ENOMEM;
+		goto put_codecb_node;
+	}
 
 	comp_idx = 0;
 	priv->dai_links[*link_idx].cpus = &compnent[comp_idx++];
@@ -816,6 +829,15 @@ static int j721e_soc_probe_ivi(struct j721e_priv *priv, int *link_idx,
 	(*conf_idx)++;
 
 	return 0;
+
+
+put_codecb_node:
+	of_node_put(codecb_node);
+put_codeca_node:
+	of_node_put(codeca_node);
+put_dai_node:
+	of_node_put(dai_node);
+	return ret;
 }
 
 static int j721e_soc_probe(struct platform_device *pdev)
-- 
2.25.1