redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

ASoC: fsl_audmix: Add spin lock to protect tdms 

commit fe965096c9 upstream.

Audmix support two substream, When two substream start
to run, the trigger function may be called by two substream
in same time, that the priv->tdms may be updated wrongly.

The expected priv->tdms is 0x3, but sometimes the
result is 0x2, or 0x1.

Fixes: be1df61cf0 ("ASoC: fsl: Add Audio Mixer CPU DAI driver")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/1e706afe53fdd1fbbbc79277c48a98f8416ba873.1573458378.git.shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Shengjiu Wang 2019-11-11 15:50:48 +08:00 committed by Greg Kroah-Hartman
parent 9ae0611f0c
commit a11fab7708
2 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
sound/soc/fsl/fsl_audmix.c
View File

@ -286,6 +286,7 @@ static int fsl_audmix_dai_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct fsl_audmix *priv = snd_soc_dai_get_drvdata(dai);
unsigned long lock_flags;
/* Capture stream shall not be handled */
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
@ -295,12 +296,16 @@ static int fsl_audmix_dai_trigger(struct snd_pcm_substream *substream, int cmd,
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
spin_lock_irqsave(&priv->lock, lock_flags);
priv->tdms |= BIT(dai->driver->id);
spin_unlock_irqrestore(&priv->lock, lock_flags);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
spin_lock_irqsave(&priv->lock, lock_flags);
priv->tdms &= ~BIT(dai->driver->id);
spin_unlock_irqrestore(&priv->lock, lock_flags);
break;
default:
return -EINVAL;
@ -491,6 +496,7 @@ static int fsl_audmix_probe(struct platform_device *pdev)
return PTR_ERR(priv->ipg_clk);
}
spin_lock_init(&priv->lock);
platform_set_drvdata(pdev, priv);
pm_runtime_enable(dev);

1
sound/soc/fsl/fsl_audmix.h
View File

@ -96,6 +96,7 @@ struct fsl_audmix {
struct platform_device *pdev;
struct regmap *regmap;
struct clk *ipg_clk;
spinlock_t lock; /* Protect tdms */
u8 tdms;
};