From abb68c26ba15f8e84e580a40c0b1bc349cb534b0 Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Fri, 13 Jun 2008 16:24:04 +0100
Subject: ALSA: ASoC: Check for exact register match in wm97xx_reset()

To provide added robustness in case an AC97 controller reads back all
zeros in error cases check for an exact match when testing to see if
resets have brought the codec back.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/sound/soc/codecs/wm9712.c b/sound/soc/codecs/wm9712.c
index 28ac66f..4739011 100644
--- a/sound/soc/codecs/wm9712.c
+++ b/sound/soc/codecs/wm9712.c
@@ -589,12 +589,12 @@ static int wm9712_reset(struct snd_soc_codec *codec, int try_warm)
 {
 	if (try_warm && soc_ac97_ops.warm_reset) {
 		soc_ac97_ops.warm_reset(codec->ac97);
-		if (!(ac97_read(codec, 0) & 0x8000))
+		if (ac97_read(codec, 0) == wm9712_reg[0])
 			return 1;
 	}
 
 	soc_ac97_ops.reset(codec->ac97);
-	if (ac97_read(codec, 0) & 0x8000)
+	if (ac97_read(codec, 0) != wm9712_reg[0])
 		goto err;
 	return 0;
 
diff --git a/sound/soc/codecs/wm9713.c b/sound/soc/codecs/wm9713.c
index aba3301..0db9637 100644
--- a/sound/soc/codecs/wm9713.c
+++ b/sound/soc/codecs/wm9713.c
@@ -1076,12 +1076,12 @@ int wm9713_reset(struct snd_soc_codec *codec, int try_warm)
 {
 	if (try_warm && soc_ac97_ops.warm_reset) {
 		soc_ac97_ops.warm_reset(codec->ac97);
-		if (!(ac97_read(codec, 0) & 0x8000))
+		if (ac97_read(codec, 0) == wm9713_reg[0])
 			return 1;
 	}
 
 	soc_ac97_ops.reset(codec->ac97);
-	if (ac97_read(codec, 0) & 0x8000)
+	if (ac97_read(codec, 0) != wm9713_reg[0])
 		return -EIO;
 	return 0;
 }
-- 
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