int cdns_set_sdw_stream()

in cadence_master.c [1654:1701]

• 38 lines of code
• 7 McCabe index (conditional complexity)

int cdns_set_sdw_stream(struct snd_soc_dai *dai,
			void *stream, int direction)
{
	struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
	struct sdw_cdns_dma_data *dma;

	if (stream) {
		/* first paranoia check */
		if (direction == SNDRV_PCM_STREAM_PLAYBACK)
			dma = dai->playback_dma_data;
		else
			dma = dai->capture_dma_data;

		if (dma) {
			dev_err(dai->dev,
				"dma_data already allocated for dai %s\n",
				dai->name);
			return -EINVAL;
		}

		/* allocate and set dma info */
		dma = kzalloc(sizeof(*dma), GFP_KERNEL);
		if (!dma)
			return -ENOMEM;

		dma->stream_type = SDW_STREAM_PCM;

		dma->bus = &cdns->bus;
		dma->link_id = cdns->instance;

		dma->stream = stream;

		if (direction == SNDRV_PCM_STREAM_PLAYBACK)
			dai->playback_dma_data = dma;
		else
			dai->capture_dma_data = dma;
	} else {
		/* for NULL stream we release allocated dma_data */
		if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
			kfree(dai->playback_dma_data);
			dai->playback_dma_data = NULL;
		} else {
			kfree(dai->capture_dma_data);
			dai->capture_dma_data = NULL;
		}
	}
	return 0;
}