linux-kernel - [PATCH] ASoC: DaVinci: fix kernel panic due to uninitialized platform

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Date:	Thu, 27 Jan 2011 19:17:43 +0530
From:	"Manjunathappa, Prakash" <prakash.pm@...com>
To:	Liam Girdwood <lrg@...mlogic.co.uk>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	alsa-devel@...a-project.org,
	davinci-linux-open-source@...ux.davincidsp.com,
	linux-arm-kernel@...ts.infradead.org, stable@...nel.org,
	linux-kernel@...r.kernel.org,
	"Manjunathappa, Prakash" <prakash.pm@...com>
Subject: [PATCH] ASoC: DaVinci: fix kernel panic due to uninitialized platform_data

This patch fixes the Kernel panic issue on accessing davinci_vc in
cq93vc_probe function. struct davinci_vc is part of platform device's
private driver data(codec->dev->p->driver_data) and this is populated
by DaVinci Voice Codec MFD driver.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@...com>
---
This patch applies to Linus's tree at [1].

[1] http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
---
 sound/soc/codecs/cq93vc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/sound/soc/codecs/cq93vc.c b/sound/soc/codecs/cq93vc.c
index 46dbfd0..347a567 100644
--- a/sound/soc/codecs/cq93vc.c
+++ b/sound/soc/codecs/cq93vc.c
@@ -153,7 +153,7 @@ static int cq93vc_resume(struct snd_soc_codec *codec)
 
 static int cq93vc_probe(struct snd_soc_codec *codec)
 {
-	struct davinci_vc *davinci_vc = codec->dev->platform_data;
+	struct davinci_vc *davinci_vc = snd_soc_codec_get_drvdata(codec);
 
 	davinci_vc->cq93vc.codec = codec;
 	codec->control_data = davinci_vc;
-- 
1.7.1

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