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

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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).

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