From: Barry Song <21cnbao@gmail.com>
Date: Thu, 12 Nov 2009 04:01:47 +0000 (+0800)
Subject: ASoC: move setting ac97 platformdata earlier than ac97 read/write
X-Git-Tag: v2.6.33-rc1~390^2~1^2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f773205300fa4a5a405f8ed6e3bb97e46c6eefb4;p=pandora-kernel.git

ASoC: move setting ac97 platformdata earlier than ac97 read/write

While probing, AC97 codec drivers and soc-core generically execute the
following sequence:
snd_soc_new_ac97_codec -> snd_soc_new_pcms -> reset ac-link/read AC97 ID
to detect ->...  -> set platform_data to ac97 by soc-core

commit 474828a40f6ddab6e2a3475a19c5c84aa3ec7d60 adds platform_data to
snd_ac97 instance. But ac97 platform data hasn't given to snd_ac97
before actual ac97 operations. Then while ac97_read access platform_data
of snd_ac97 for detecting, NULL pointer oops will fire. That means old
platform_data patch doesn't work in real-life cases.

This patch moves the operation of setting ac97 platform_data earlier
than ac97 reading/writing operations. Then it makes platform_data of
AC97 become practically useful.

Signed-off-by: Barry Song <21cnbao@gmail.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

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