ASoC: Only deregister AC97 dev if it's name was not "AC97"

The commit 14fa43f53ff3a9c3d8b9662574b7369812a31a97 ("ASoC: Only
register AC97 bus if it's not done already") added a condition for
calling of soc_ac97_dev_register() but not added for calling of
soc_ac97_dev_unregister().  This patch adds same condition for
soc_ac97_dev_unregister().  Without this fix, kernel crashes when
unloading an asoc driver.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 16518329f6b2..6e710f705a74 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1432,7 +1432,8 @@ void snd_soc_free_pcms(struct snd_soc_device *socdev)
 #ifdef CONFIG_SND_SOC_AC97_BUS
         for (i = 0; i < codec->num_dai; i++) {
                 codec_dai = &codec->dai[i];
-                if (codec_dai->ac97_control && codec->ac97) {
+                if (codec_dai->ac97_control && codec->ac97 &&
+                    strcmp(codec->name, "AC97") != 0) {
                         soc_ac97_dev_unregister(codec);
                         goto free_card;
                 }