linux-kernel - [PATCH 1/2] ASoC: fsl_mqs: move of_node

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Message-Id: <20230403152647.17638-1-yll@hust.edu.cn>
Date:   Mon,  3 Apr 2023 23:26:47 +0800
From:   Liliang Ye <yll@...t.edu.cn>
To:     Shengjiu Wang <shengjiu.wang@...il.com>,
        Xiubo Li <Xiubo.Lee@...il.com>,
        Fabio Estevam <festevam@...il.com>,
        Nicolin Chen <nicoleotsuka@...il.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Dan Carpenter <error27@...il.com>
Cc:     hust-os-kernel-patches@...glegroups.com,
        Liliang Ye <yll@...t.edu.cn>, alsa-devel@...a-project.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] ASoC: fsl_mqs: move of_node_put() to the correct location

of_node_put() should have been done directly after
mqs_priv->regmap = syscon_node_to_regmap(gpr_np);
otherwise it creates a reference leak on the success path.

To fix this, of_node_put() is moved to the correct location, and change
all the gotos to direct returns.

Fixes: a9d273671440 ("ASoC: fsl_mqs: Fix error handling in probe")
Signed-off-by: Liliang Ye <yll@...t.edu.cn>
Reviewed-by: Dan Carpenter <error27@...il.com>
---
 sound/soc/fsl/fsl_mqs.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/sound/soc/fsl/fsl_mqs.c b/sound/soc/fsl/fsl_mqs.c
index 4922e6795b73..32d20d351bbf 100644
--- a/sound/soc/fsl/fsl_mqs.c
+++ b/sound/soc/fsl/fsl_mqs.c
@@ -210,10 +210,10 @@ static int fsl_mqs_probe(struct platform_device *pdev)
 		}
 
 		mqs_priv->regmap = syscon_node_to_regmap(gpr_np);
+		of_node_put(gpr_np);
 		if (IS_ERR(mqs_priv->regmap)) {
 			dev_err(&pdev->dev, "failed to get gpr regmap\n");
-			ret = PTR_ERR(mqs_priv->regmap);
-			goto err_free_gpr_np;
+			return PTR_ERR(mqs_priv->regmap);
 		}
 	} else {
 		regs = devm_platform_ioremap_resource(pdev, 0);
@@ -242,8 +242,7 @@ static int fsl_mqs_probe(struct platform_device *pdev)
 	if (IS_ERR(mqs_priv->mclk)) {
 		dev_err(&pdev->dev, "failed to get the clock: %ld\n",
 			PTR_ERR(mqs_priv->mclk));
-		ret = PTR_ERR(mqs_priv->mclk);
-		goto err_free_gpr_np;
+		return PTR_ERR(mqs_priv->mclk);
 	}
 
 	dev_set_drvdata(&pdev->dev, mqs_priv);
@@ -252,13 +251,9 @@ static int fsl_mqs_probe(struct platform_device *pdev)
 	ret = devm_snd_soc_register_component(&pdev->dev, &soc_codec_fsl_mqs,
 			&fsl_mqs_dai, 1);
 	if (ret)
-		goto err_free_gpr_np;
-	return 0;
-
-err_free_gpr_np:
-	of_node_put(gpr_np);
+		return ret;
 
-	return ret;
+	return 0;
 }
 
 static int fsl_mqs_remove(struct platform_device *pdev)
-- 
2.34.1