diff options
Diffstat (limited to 'sound/soc/s3c24xx/s3c24xx-pcm.c')
| -rw-r--r-- | sound/soc/s3c24xx/s3c24xx-pcm.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/sound/soc/s3c24xx/s3c24xx-pcm.c b/sound/soc/s3c24xx/s3c24xx-pcm.c index bfbdc3cbd43..4107a87d4de 100644 --- a/sound/soc/s3c24xx/s3c24xx-pcm.c +++ b/sound/soc/s3c24xx/s3c24xx-pcm.c @@ -158,18 +158,22 @@ static int s3c24xx_pcm_hw_params(struct snd_pcm_substream *substream, if (!dma) return 0; - /* prepare DMA */ - prtd->params = dma; + /* this may get called several times by oss emulation + * with different params -HW */ + if (prtd->params == NULL) { + /* prepare DMA */ + prtd->params = dma; - DBG("params %p, client %p, channel %d\n", prtd->params, - prtd->params->client, prtd->params->channel); + DBG("params %p, client %p, channel %d\n", prtd->params, + prtd->params->client, prtd->params->channel); - ret = s3c2410_dma_request(prtd->params->channel, - prtd->params->client, NULL); + ret = s3c2410_dma_request(prtd->params->channel, + prtd->params->client, NULL); - if (ret) { - DBG(KERN_ERR "failed to get dma channel\n"); - return ret; + if (ret) { + DBG(KERN_ERR "failed to get dma channel\n"); + return ret; + } } /* channel needs configuring for mem=>device, increment memory addr, |