diff mbox series

ASoC: mediatek: Fix error handling in mt8183_da7219_max98357_dev_probe

Message ID 20220307131924.9905-1-linmq006@gmail.com (mailing list archive)
State New, archived
Headers show
Series ASoC: mediatek: Fix error handling in mt8183_da7219_max98357_dev_probe | expand

Commit Message

Miaoqian Lin March 7, 2022, 1:19 p.m. UTC 
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: ebbddc75bbe8 ("ASoC: Mediatek: MT8183: Add machine driver with DA7219")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 .../mediatek/mt8183/mt8183-da7219-max98357.c  | 23 +++++++++++++------
 1 file changed, 16 insertions(+), 7 deletions(-)

Comments

Tzung-Bi Shih March 8, 2022, 2:03 a.m. UTC | #1 
On Mon, Mar 07, 2022 at 01:19:21PM +0000, Miaoqian Lin wrote:
> 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: ebbddc75bbe8 ("ASoC: Mediatek: MT8183: Add machine driver with DA7219")

I am not sure if the Fixes tag makes sense.  ebbddc75bbe8 is the first commit
for the file; however, we have some more commits in between tip and
ebbddc75bbe8.

> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>

With the minor comment,
Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
diff mbox series

Patch

diff --git a/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c b/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c
index 718505c75418..f090dee0c7a4 100644
--- a/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c
+++ b/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c
@@ -695,8 +695,11 @@  static int mt8183_da7219_max98357_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,
@@ -761,12 +764,15 @@  static int mt8183_da7219_max98357_dev_probe(struct platform_device *pdev)
 	if (!mt8183_da7219_max98357_headset_dev.dlc.of_node) {
 		dev_err(&pdev->dev,
 			"Property 'mediatek,headset-codec' missing/invalid\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto put_hdmi_codec;
 	}
 
 	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);
 
@@ -775,13 +781,16 @@  static int mt8183_da7219_max98357_dev_probe(struct platform_device *pdev)
 		ret = PTR_ERR(pinctrl);
 		dev_err(&pdev->dev, "%s failed to select default state %d\n",
 			__func__, 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;
 }