linux-kernel - [PATCH v2] ASoC: samsung: Fix error handling in aries_audio

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Date:   Fri,  3 Jun 2022 17:06:39 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Jonathan Bakker <xc-racer2@...e.ca>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH v2] ASoC: samsung: Fix error handling in aries_audio_probe

of_get_child_by_name() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
This function is missing of_node_put(cpu) in the error path.
Fix this by goto out label. of_node_put() will check NULL pointer.

Fixes: 7a3a7671fa6c ("ASoC: samsung: Add driver for Aries boards")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
changes in v2:
- update Fixes tag.
v1 Link: https://lore.kernel.org/r/20220602130218.14901-1-linmq006@gmail.com
---
 sound/soc/samsung/aries_wm8994.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sound/soc/samsung/aries_wm8994.c b/sound/soc/samsung/aries_wm8994.c
index bb0cf4244e00..edee02d7f100 100644
--- a/sound/soc/samsung/aries_wm8994.c
+++ b/sound/soc/samsung/aries_wm8994.c
@@ -628,8 +628,10 @@ static int aries_audio_probe(struct platform_device *pdev)
 		return -EINVAL;
 
 	codec = of_get_child_by_name(dev->of_node, "codec");
-	if (!codec)
-		return -EINVAL;
+	if (!codec) {
+		ret = -EINVAL;
+		goto out;
+	}
 
 	for_each_card_prelinks(card, i, dai_link) {
 		dai_link->codecs->of_node = of_parse_phandle(codec,
-- 
2.25.1