Re: [alsa-devel] [PATCH V2 01/10] ASoc: mxs: add mxs-pcm driver

On Tue, Jul 12, 2011 at 11:04:36PM +0800, Dong Aisheng wrote:

• if (dai->driver->capture.channels_min) {

• ret = mxs_pcm_preallocate_dma_buffer(pcm,
  

• 	SNDRV_PCM_STREAM_CAPTURE);
  

• if (ret)
  

• 	goto out;
  

• }

For robustness replace the channels_min check with a check for the relevant substream being present (see pxa2xx-pcm.c for a recent example).