From 6a90d536feeccb2c84a2831252b1ed4642684da3 Mon Sep 17 00:00:00 2001 From: Troy Kisky Date: Thu, 6 Aug 2009 16:55:32 -0700 Subject: ASoC: DaVinci: pcm, constrain buffer size to multiple of period The dma setup code assumes that the buffer size is a multiple of the period size. Signed-off-by: Troy Kisky Signed-off-by: Mark Brown --- sound/soc/davinci/davinci-pcm.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'sound/soc/davinci') diff --git a/sound/soc/davinci/davinci-pcm.c b/sound/soc/davinci/davinci-pcm.c index 8fd0c3cdc710..ab43a539c11d 100644 --- a/sound/soc/davinci/davinci-pcm.c +++ b/sound/soc/davinci/davinci-pcm.c @@ -244,6 +244,11 @@ static int davinci_pcm_open(struct snd_pcm_substream *substream) int ret = 0; snd_soc_set_runtime_hwparams(substream, &davinci_pcm_hardware); + /* ensure that buffer size is a multiple of period size */ + ret = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (ret < 0) + return ret; prtd = kzalloc(sizeof(struct davinci_runtime_data), GFP_KERNEL); if (prtd == NULL) -- cgit v1.2.3