If codec->control_data is not provided, the following crash happens:
Unable to handle kernel NULL pointer dereference at virtual address 00000078 pgd = 80004000 [00000078] *pgd=00000000 Internal error: Oops: 5 [#1] SMP ARM Modules linked in: CPU: 0 Tainted: G W (3.5.0-next-20120725+ #1263) PC is at regmap_read+0x18/0x64 LR is at hw_read+0x50/0x98 pc : [<802bcd90>] lr : [<803cad18>] psr: 60000013 ...
Signed-off-by: Fabio Estevam fabio.estevam@freescale.com --- sound/soc/codecs/mc13783.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/sound/soc/codecs/mc13783.c b/sound/soc/codecs/mc13783.c index 6276e35..c8251af 100644 --- a/sound/soc/codecs/mc13783.c +++ b/sound/soc/codecs/mc13783.c @@ -581,6 +581,8 @@ static int mc13783_probe(struct snd_soc_codec *codec) { struct mc13783_priv *priv = snd_soc_codec_get_drvdata(codec);
+ codec->control_data = priv->mc13xxx; + mc13xxx_lock(priv->mc13xxx);
/* these are the reset values */