Verify that the correct register has been received from the codec.
Signed-off-by: Manuel Lauss <manuel.lauss@xxxxxxxxx>
---
sound/soc/au1x/psc-ac97.c | 11 ++++++++---
1 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/sound/soc/au1x/psc-ac97.c b/sound/soc/au1x/psc-ac97.c
index a521aa9..efe2afd 100644
--- a/sound/soc/au1x/psc-ac97.c
+++ b/sound/soc/au1x/psc-ac97.c
@@ -61,7 +61,8 @@ static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97,
{
/* FIXME */
struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
- unsigned short data, retry, tmo;
+ unsigned short retry, tmo;
+ unsigned long data;
au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
au_sync();
@@ -79,15 +80,19 @@ static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97,
&& --tmo)
udelay(2);
- data = au_readl(AC97_CDC(pscdata)) & 0xffff;
+ data = au_readl(AC97_CDC(pscdata));
au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
au_sync();
mutex_unlock(&pscdata->lock);
+
+ if (reg != ((data >> 16) & 0x7f))
+ tmo = 1; /* wrong register, try again */
+
} while (--retry && !tmo);
- return retry ? data : 0xffff;
+ return retry ? data & 0xffff : 0xffff;
}
/* AC97 controller writes to codec register */
--
1.6.5
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