Hi Karthikeyan, FYI, the error/warning still remains. tree: https://android.googlesource.com/kernel/common android-4.19-stable head: 5473d45de03644eef58c95d5f67ca1821cbfd122 commit: 8c62976a01249b4da610adc1d4d2ead9185a6131 [15309/17900] ANDROID: GKI: ALSA: pcm: add locks for accessing runtime resource config: x86_64-randconfig-a015-20200823 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project b587ca93be114d07ec3bf654add97d7872325281) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout 8c62976a01249b4da610adc1d4d2ead9185a6131 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w, ^ 1 warning generated. git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android-4.19-stable git checkout 8c62976a01249b4da610adc1d4d2ead9185a6131 vim +/snd_soc_dai_link_event +3678 sound/soc/soc-dapm.c 4ba1327ab8ce17 Mark Brown 2008-05-13 3677 c74184ed30ecce Mark Brown 2012-04-04 @3678 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w, c74184ed30ecce Mark Brown 2012-04-04 3679 struct snd_kcontrol *kcontrol, int event) c74184ed30ecce Mark Brown 2012-04-04 3680 { c74184ed30ecce Mark Brown 2012-04-04 3681 struct snd_soc_dapm_path *source_p, *sink_p; c74184ed30ecce Mark Brown 2012-04-04 3682 struct snd_soc_dai *source, *sink; 249dc49576fc95 Charles Keepax 2018-08-15 3683 struct snd_soc_pcm_runtime *rtd = w->priv; c66150824b8a80 Nikesh Oswal 2015-02-02 3684 const struct snd_soc_pcm_stream *config = w->params + w->params_select; c74184ed30ecce Mark Brown 2012-04-04 3685 struct snd_pcm_substream substream; 9747cec21e2d55 Mark Brown 2012-04-26 3686 struct snd_pcm_hw_params *params = NULL; 8053f21675b073 Nicolin Chen 2016-07-26 3687 struct snd_pcm_runtime *runtime = NULL; 3ba66feb59810e Takashi Iwai 2018-07-25 3688 unsigned int fmt; 0376916b7b2cff Charles Keepax 2018-09-06 3689 int ret = 0; c74184ed30ecce Mark Brown 2012-04-04 3690 bf4edea863c435 Takashi Iwai 2013-11-07 3691 if (WARN_ON(!config) || a3423b02cf745c Lars-Peter Clausen 2015-08-11 3692 WARN_ON(list_empty(&w->edges[SND_SOC_DAPM_DIR_OUT]) || a3423b02cf745c Lars-Peter Clausen 2015-08-11 3693 list_empty(&w->edges[SND_SOC_DAPM_DIR_IN]))) bf4edea863c435 Takashi Iwai 2013-11-07 3694 return -EINVAL; c74184ed30ecce Mark Brown 2012-04-04 3695 c74184ed30ecce Mark Brown 2012-04-04 3696 /* We only support a single source and sink, pick the first */ a3423b02cf745c Lars-Peter Clausen 2015-08-11 3697 source_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_OUT], a3423b02cf745c Lars-Peter Clausen 2015-08-11 3698 struct snd_soc_dapm_path, a3423b02cf745c Lars-Peter Clausen 2015-08-11 3699 list_node[SND_SOC_DAPM_DIR_OUT]); a3423b02cf745c Lars-Peter Clausen 2015-08-11 3700 sink_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_IN], a3423b02cf745c Lars-Peter Clausen 2015-08-11 3701 struct snd_soc_dapm_path, a3423b02cf745c Lars-Peter Clausen 2015-08-11 3702 list_node[SND_SOC_DAPM_DIR_IN]); c74184ed30ecce Mark Brown 2012-04-04 3703 c74184ed30ecce Mark Brown 2012-04-04 3704 source = source_p->source->priv; c74184ed30ecce Mark Brown 2012-04-04 3705 sink = sink_p->sink->priv; c74184ed30ecce Mark Brown 2012-04-04 3706 c74184ed30ecce Mark Brown 2012-04-04 3707 /* Be a little careful as we don't want to overflow the mask array */ c74184ed30ecce Mark Brown 2012-04-04 3708 if (config->formats) { c74184ed30ecce Mark Brown 2012-04-04 3709 fmt = ffs(config->formats) - 1; c74184ed30ecce Mark Brown 2012-04-04 3710 } else { 30a6a1a4eed170 Liam Girdwood 2012-11-19 3711 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n", c74184ed30ecce Mark Brown 2012-04-04 3712 config->formats); c74184ed30ecce Mark Brown 2012-04-04 3713 fmt = 0; c74184ed30ecce Mark Brown 2012-04-04 3714 } c74184ed30ecce Mark Brown 2012-04-04 3715 c74184ed30ecce Mark Brown 2012-04-04 3716 /* Currently very limited parameter selection */ 9747cec21e2d55 Mark Brown 2012-04-26 3717 params = kzalloc(sizeof(*params), GFP_KERNEL); 9747cec21e2d55 Mark Brown 2012-04-26 3718 if (!params) { 9747cec21e2d55 Mark Brown 2012-04-26 3719 ret = -ENOMEM; 9747cec21e2d55 Mark Brown 2012-04-26 3720 goto out; 9747cec21e2d55 Mark Brown 2012-04-26 3721 } 9747cec21e2d55 Mark Brown 2012-04-26 3722 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt); c74184ed30ecce Mark Brown 2012-04-04 3723 9747cec21e2d55 Mark Brown 2012-04-26 3724 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min = c74184ed30ecce Mark Brown 2012-04-04 3725 config->rate_min; 9747cec21e2d55 Mark Brown 2012-04-26 3726 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max = c74184ed30ecce Mark Brown 2012-04-04 3727 config->rate_max; c74184ed30ecce Mark Brown 2012-04-04 3728 9747cec21e2d55 Mark Brown 2012-04-26 3729 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min c74184ed30ecce Mark Brown 2012-04-04 3730 = config->channels_min; 9747cec21e2d55 Mark Brown 2012-04-26 3731 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max c74184ed30ecce Mark Brown 2012-04-04 3732 = config->channels_max; c74184ed30ecce Mark Brown 2012-04-04 3733 c74184ed30ecce Mark Brown 2012-04-04 3734 memset(&substream, 0, sizeof(substream)); c74184ed30ecce Mark Brown 2012-04-04 3735 8053f21675b073 Nicolin Chen 2016-07-26 3736 /* Allocate a dummy snd_pcm_runtime for startup() and other ops() */ 8053f21675b073 Nicolin Chen 2016-07-26 3737 runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); 8053f21675b073 Nicolin Chen 2016-07-26 3738 if (!runtime) { 8053f21675b073 Nicolin Chen 2016-07-26 3739 ret = -ENOMEM; 8053f21675b073 Nicolin Chen 2016-07-26 3740 goto out; 8053f21675b073 Nicolin Chen 2016-07-26 3741 } 8053f21675b073 Nicolin Chen 2016-07-26 3742 substream.runtime = runtime; 249dc49576fc95 Charles Keepax 2018-08-15 3743 substream.private_data = rtd; 8053f21675b073 Nicolin Chen 2016-07-26 3744 c74184ed30ecce Mark Brown 2012-04-04 3745 switch (event) { c74184ed30ecce Mark Brown 2012-04-04 3746 case SND_SOC_DAPM_PRE_PMU: c74184ed30ecce Mark Brown 2012-04-04 3747 substream.stream = SNDRV_PCM_STREAM_CAPTURE; 9900a4226c785d Kuninori Morimoto 2017-09-25 3748 if (source->driver->ops->startup) { 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3749 ret = source->driver->ops->startup(&substream, source); 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3750 if (ret < 0) { 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3751 dev_err(source->dev, 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3752 "ASoC: startup() failed: %d\n", ret); 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3753 goto out; 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3754 } 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3755 source->active++; 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3756 } 93e6958a3674d2 Benoit Cousson 2014-07-08 3757 ret = soc_dai_hw_params(&substream, params, source); 93e6958a3674d2 Benoit Cousson 2014-07-08 3758 if (ret < 0) 9747cec21e2d55 Mark Brown 2012-04-26 3759 goto out; c74184ed30ecce Mark Brown 2012-04-04 3760 c74184ed30ecce Mark Brown 2012-04-04 3761 substream.stream = SNDRV_PCM_STREAM_PLAYBACK; 9900a4226c785d Kuninori Morimoto 2017-09-25 3762 if (sink->driver->ops->startup) { 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3763 ret = sink->driver->ops->startup(&substream, sink); 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3764 if (ret < 0) { 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3765 dev_err(sink->dev, 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3766 "ASoC: startup() failed: %d\n", ret); 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3767 goto out; 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3768 } 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3769 sink->active++; 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3770 } 93e6958a3674d2 Benoit Cousson 2014-07-08 3771 ret = soc_dai_hw_params(&substream, params, sink); 93e6958a3674d2 Benoit Cousson 2014-07-08 3772 if (ret < 0) 9747cec21e2d55 Mark Brown 2012-04-26 3773 goto out; c74184ed30ecce Mark Brown 2012-04-04 3774 break; c74184ed30ecce Mark Brown 2012-04-04 3775 c74184ed30ecce Mark Brown 2012-04-04 3776 case SND_SOC_DAPM_POST_PMU: da18396f949eca Mark Brown 2013-02-06 3777 ret = snd_soc_dai_digital_mute(sink, 0, da18396f949eca Mark Brown 2013-02-06 3778 SNDRV_PCM_STREAM_PLAYBACK); c74184ed30ecce Mark Brown 2012-04-04 3779 if (ret != 0 && ret != -ENOTSUPP) 30a6a1a4eed170 Liam Girdwood 2012-11-19 3780 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret); 9747cec21e2d55 Mark Brown 2012-04-26 3781 ret = 0; c74184ed30ecce Mark Brown 2012-04-04 3782 break; c74184ed30ecce Mark Brown 2012-04-04 3783 c74184ed30ecce Mark Brown 2012-04-04 3784 case SND_SOC_DAPM_PRE_PMD: da18396f949eca Mark Brown 2013-02-06 3785 ret = snd_soc_dai_digital_mute(sink, 1, da18396f949eca Mark Brown 2013-02-06 3786 SNDRV_PCM_STREAM_PLAYBACK); c74184ed30ecce Mark Brown 2012-04-04 3787 if (ret != 0 && ret != -ENOTSUPP) 30a6a1a4eed170 Liam Girdwood 2012-11-19 3788 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret); 9747cec21e2d55 Mark Brown 2012-04-26 3789 ret = 0; 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3790 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3791 source->active--; 9900a4226c785d Kuninori Morimoto 2017-09-25 3792 if (source->driver->ops->shutdown) { 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3793 substream.stream = SNDRV_PCM_STREAM_CAPTURE; 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3794 source->driver->ops->shutdown(&substream, source); 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3795 } 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3796 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3797 sink->active--; 9900a4226c785d Kuninori Morimoto 2017-09-25 3798 if (sink->driver->ops->shutdown) { 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3799 substream.stream = SNDRV_PCM_STREAM_PLAYBACK; 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3800 sink->driver->ops->shutdown(&substream, sink); 9b8ef9f6b3fccc Jeeja KP 2015-10-20 3801 } c74184ed30ecce Mark Brown 2012-04-04 3802 break; c74184ed30ecce Mark Brown 2012-04-04 3803 c74184ed30ecce Mark Brown 2012-04-04 3804 default: a6ed0608bd289b Takashi Iwai 2013-11-06 3805 WARN(1, "Unknown event %d\n", event); 75881df3fd7708 Sudip Mukherjee 2015-09-10 3806 ret = -EINVAL; c74184ed30ecce Mark Brown 2012-04-04 3807 } c74184ed30ecce Mark Brown 2012-04-04 3808 9747cec21e2d55 Mark Brown 2012-04-26 3809 out: 8053f21675b073 Nicolin Chen 2016-07-26 3810 kfree(runtime); 9747cec21e2d55 Mark Brown 2012-04-26 3811 kfree(params); 9747cec21e2d55 Mark Brown 2012-04-26 3812 return ret; c74184ed30ecce Mark Brown 2012-04-04 3813 } c74184ed30ecce Mark Brown 2012-04-04 3814 :::::: The code at line 3678 was first introduced by commit :::::: c74184ed30ecce2a5e9ae9aa22cb5e3942e0c7c7 ASoC: core: Support transparent CODEC<->CODEC DAI links :::::: TO: Mark Brown <broonie(a)opensource.wolfsonmicro.com&gt; :::::: CC: Mark Brown <broonie(a)opensource.wolfsonmicro.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org