linux-kernel - [PATCHv3] ASoC: simple-card: Fix bug of wrong decrement DT node's refcount

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Date:	Mon, 1 Sep 2014 14:46:52 +0800
From:	Xiubo Li <Li.Xiubo@...escale.com>
To:	<broonie@...nel.org>, <moinejf@...e.fr>, <lgirdwood@...il.com>,
	<perex@...ex.cz>, <tiwai@...e.de>,
	<kuninori.morimoto.gx@...esas.com>, <jsarha@...com>,
	<alsa-devel@...a-project.org>
CC:	<linux-kernel@...r.kernel.org>, Xiubo Li <Li.Xiubo@...escale.com>
Subject: [PATCHv3] ASoC: simple-card: Fix bug of wrong decrement DT node's refcount

DAI links's cpu_of_node's and codec_of_node's refcounts shouldn't
be decremented immediately at the end of the probe() fucntion.
Because we will still use them before the audio card is removed.

Signed-off-by: Xiubo Li <Li.Xiubo@...escale.com>
Cc: Jean-Francois Moine <moinejf@...e.fr>
---

Change in v3:
- Follow Jean-Francois Moine's advice.
- Remove the following patch:
  "ASoC: simple-card: Fix bug of forgetting decrement DT node's refcount"




 sound/soc/generic/simple-card.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index fd8b045..986d2c7 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -481,12 +481,19 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 	snd_soc_card_set_drvdata(&priv->snd_card, priv);
 
 	ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
+	if (ret >= 0)
+		return ret;
 
 err:
 	asoc_simple_card_unref(pdev);
 	return ret;
 }
 
+static int asoc_simple_card_remove(struct platform_device *pdev)
+{
+	return asoc_simple_card_unref(pdev);
+}
+
 static const struct of_device_id asoc_simple_of_match[] = {
 	{ .compatible = "simple-audio-card", },
 	{},
@@ -500,6 +507,7 @@ static struct platform_driver asoc_simple_card = {
 		.of_match_table = asoc_simple_of_match,
 	},
 	.probe = asoc_simple_card_probe,
+	.remove = asoc_simple_card_remove,
 };
 
 module_platform_driver(asoc_simple_card);
-- 
1.8.4

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