From 73c0188609b79684e275f394ec18fd1d3ce62f27 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 22 Mar 2010 15:22:26 +0000 Subject: [xburst] sound jz4740_pcm: Don't request dma channel mor then once. It is possible that the hw_params callback is called multiple times when using the oss emulation layer. Thus we need to check whether the dma channel has already been requested otherwise we'll end up with all dma channels being requested by sound driver. git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20369 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- target/linux/xburst/files-2.6.32/sound/soc/jz4740/jz4740-pcm.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'target/linux/xburst') diff --git a/target/linux/xburst/files-2.6.32/sound/soc/jz4740/jz4740-pcm.c b/target/linux/xburst/files-2.6.32/sound/soc/jz4740/jz4740-pcm.c index c71c5b48b5..4a4de195a8 100644 --- a/target/linux/xburst/files-2.6.32/sound/soc/jz4740/jz4740-pcm.c +++ b/target/linux/xburst/files-2.6.32/sound/soc/jz4740/jz4740-pcm.c @@ -105,10 +105,11 @@ static int jz4740_pcm_hw_params(struct snd_pcm_substream *substream, struct jz4740_pcm_config *config; config = rtd->dai->cpu_dai->dma_data; - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - prtd->dma = jz4740_dma_request(substream, "PCM Playback"); - } else { - prtd->dma = jz4740_dma_request(substream, "PCM Capture"); + if (!prtd->dma) { + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + prtd->dma = jz4740_dma_request(substream, "PCM Playback"); + else + prtd->dma = jz4740_dma_request(substream, "PCM Capture"); } if (!prtd->dma) -- cgit v1.2.3