Hi Bard,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on asoc/for-next]
[also build test WARNING on next-20200117]
[cannot apply to sound/for-next v5.5-rc6]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Bard-liao/ASoC-Add-Multi-CPU-DAI-support/20200118-060035
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
config: nds32-allmodconfig (attached as .config)
compiler: nds32le-linux-gcc (GCC) 9.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=9.2.0 make.cross ARCH=nds32 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   sound/soc/soc-generic-dmaengine-pcm.c: In function 'dmaengine_pcm_compat_request_channel':
>> sound/soc/soc-generic-dmaengine-pcm.c:201:10: warning: returning 'int' from a function with return type 'struct dma_chan *' makes pointer from integer without a cast [-Wint-conversion]
     201 |   return -EINVAL;
         |          ^

vim +201 sound/soc/soc-generic-dmaengine-pcm.c

   188	
   189	static struct dma_chan *dmaengine_pcm_compat_request_channel(
   190		struct snd_soc_component *component,
   191		struct snd_soc_pcm_runtime *rtd,
   192		struct snd_pcm_substream *substream)
   193	{
   194		struct dmaengine_pcm *pcm = soc_component_to_pcm(component);
   195		struct snd_dmaengine_dai_dma_data *dma_data;
   196		dma_filter_fn fn = NULL;
   197	
   198		if (rtd->num_cpus > 1) {
   199			dev_err(rtd->dev,
   200				 "%s doesn't support Multi CPU yet\n", __func__);
 > 201			return -EINVAL;
   202		}
   203	
   204		dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
   205	
   206		if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX) && pcm->chan[0])
   207			return pcm->chan[0];
   208	
   209		if (pcm->config && pcm->config->compat_request_channel)
   210			return pcm->config->compat_request_channel(rtd, substream);
   211	
   212		if (pcm->config)
   213			fn = pcm->config->compat_filter_fn;
   214	
   215		return snd_dmaengine_pcm_request_channel(fn, dma_data->filter_data);
   216	}
   217	

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0-DAY kernel test infrastructure                 Open Source Technology Center
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