ASoC: fsl_audmix: Add spin lock to protect tdms

[linux.git] / sound / soc / fsl / fsl_audmix.c

diff --git a/sound/soc/fsl/fsl_audmix.c b/sound/soc/fsl/fsl_audmix.c
index c7e4e9757dce9246ab466424329d686154889bf0..a1db1bce330fa5c3874b52a925ef805ff87502d4 100644 (file)
--- a/sound/soc/fsl/fsl_audmix.c
+++ b/sound/soc/fsl/fsl_audmix.c
@@ -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);