Commit abb68c26 authored by Mark Brown's avatar Mark Brown Committed by Jaroslav Kysela

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: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@perex.cz>
parent aafc4412
......@@ -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;
......
......@@ -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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