[PATCH] ASoC: ti: j721e-evm: Fix refcount leak in j721e_soc_probe_*

[PATCH] ASoC: ti: j721e-evm: Fix refcount leak in j721e_soc_probe_*

[Miaoqian Lin]

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@gmail.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

Re: [PATCH] ASoC: ti: j721e-evm: Fix refcount leak in j721e_soc_probe_*

[Mark Brown]

On Thu, 12 May 2022 15:13:30 +0400, Miaoqian Lin wrote:
> 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.
> 
> 

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: ti: j721e-evm: Fix refcount leak in j721e_soc_probe_*
      commit: a34840c4eb3278a7c29c9c57a65ce7541c66f9f2

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
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Thanks,
Mark