Hi Jaroslav, I love your patch! Perhaps something to improve: [auto build test WARNING on tiwai-sound/for-next] [also build test WARNING on v5.16 next-20220113] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Jaroslav-Kysela/ALSA-pcm-accept-... base: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next config: hexagon-randconfig-r013-20220113 (https://download.01.org/0day-ci/archive/20220114/202201140042.ARpH6f9U-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d1021978b8e7e35dcc30201ca1731d64b5a602a8) 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 # https://github.com/0day-ci/linux/commit/18b89b55d815ee4e4f78fa96507d2ad7a... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jaroslav-Kysela/ALSA-pcm-accept-the-OPEN-state-for-snd_pcm_stop/20220113-193304 git checkout 18b89b55d815ee4e4f78fa96507d2ad7a03c9c8c # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash sound/core/ 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 >>): case SNDRV_PCM_STATE_SETUP: ^ sound/core/pcm_native.c:691:2: note: insert 'break;' to avoid fall-through case SNDRV_PCM_STATE_SETUP: ^ break; 1 warning generated. vim +691 sound/core/pcm_native.c 60f96aaecb19ca2 Takashi Sakamoto 2017-06-09 674 877211f5e1b1196 Takashi Iwai 2005-11-17 675 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 877211f5e1b1196 Takashi Iwai 2005-11-17 676 struct snd_pcm_hw_params *params) ^1da177e4c3f415 Linus Torvalds 2005-04-16 677 { 877211f5e1b1196 Takashi Iwai 2005-11-17 678 struct snd_pcm_runtime *runtime; 9442e691e4aec85 Takashi Iwai 2006-09-30 679 int err, usecs; ^1da177e4c3f415 Linus Torvalds 2005-04-16 680 unsigned int bits; ^1da177e4c3f415 Linus Torvalds 2005-04-16 681 snd_pcm_uframes_t frames; ^1da177e4c3f415 Linus Torvalds 2005-04-16 682 7eaa943c8ed8e91 Takashi Iwai 2008-08-08 683 if (PCM_RUNTIME_CHECK(substream)) 7eaa943c8ed8e91 Takashi Iwai 2008-08-08 684 return -ENXIO; ^1da177e4c3f415 Linus Torvalds 2005-04-16 685 runtime = substream->runtime; ^1da177e4c3f415 Linus Torvalds 2005-04-16 686 snd_pcm_stream_lock_irq(substream); ^1da177e4c3f415 Linus Torvalds 2005-04-16 687 switch (runtime->status->state) { ^1da177e4c3f415 Linus Torvalds 2005-04-16 688 case SNDRV_PCM_STATE_OPEN: 18b89b55d815ee4 Jaroslav Kysela 2022-01-13 689 if (atomic_read(&substream->queued_hw_free)) 18b89b55d815ee4 Jaroslav Kysela 2022-01-13 690 goto __badfd; ^1da177e4c3f415 Linus Torvalds 2005-04-16 @691 case SNDRV_PCM_STATE_SETUP: ^1da177e4c3f415 Linus Torvalds 2005-04-16 692 case SNDRV_PCM_STATE_PREPARED: ^1da177e4c3f415 Linus Torvalds 2005-04-16 693 break; ^1da177e4c3f415 Linus Torvalds 2005-04-16 694 default: 18b89b55d815ee4 Jaroslav Kysela 2022-01-13 695 __badfd: ^1da177e4c3f415 Linus Torvalds 2005-04-16 696 snd_pcm_stream_unlock_irq(substream); ^1da177e4c3f415 Linus Torvalds 2005-04-16 697 return -EBADFD; ^1da177e4c3f415 Linus Torvalds 2005-04-16 698 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 699 snd_pcm_stream_unlock_irq(substream); 8eeaa2f9e06dcfb Takashi Iwai 2014-02-10 700 #if IS_ENABLED(CONFIG_SND_PCM_OSS) ^1da177e4c3f415 Linus Torvalds 2005-04-16 701 if (!substream->oss.oss) ^1da177e4c3f415 Linus Torvalds 2005-04-16 702 #endif 9c323fcbc51493f Takashi Iwai 2006-04-28 703 if (atomic_read(&substream->mmap_count)) ^1da177e4c3f415 Linus Torvalds 2005-04-16 704 return -EBADFD; ^1da177e4c3f415 Linus Torvalds 2005-04-16 705 29bb274e9497466 Takashi Iwai 2021-02-06 706 snd_pcm_sync_stop(substream, true); 1e850beea2781d3 Takashi Iwai 2019-11-17 707 ^1da177e4c3f415 Linus Torvalds 2005-04-16 708 params->rmask = ~0U; ^1da177e4c3f415 Linus Torvalds 2005-04-16 709 err = snd_pcm_hw_refine(substream, params); ^1da177e4c3f415 Linus Torvalds 2005-04-16 710 if (err < 0) ^1da177e4c3f415 Linus Torvalds 2005-04-16 711 goto _error; ^1da177e4c3f415 Linus Torvalds 2005-04-16 712 ^1da177e4c3f415 Linus Torvalds 2005-04-16 713 err = snd_pcm_hw_params_choose(substream, params); ^1da177e4c3f415 Linus Torvalds 2005-04-16 714 if (err < 0) ^1da177e4c3f415 Linus Torvalds 2005-04-16 715 goto _error; ^1da177e4c3f415 Linus Torvalds 2005-04-16 716 f9a076bff053100 Takashi Sakamoto 2017-06-09 717 err = fixup_unreferenced_params(substream, params); f9a076bff053100 Takashi Sakamoto 2017-06-09 718 if (err < 0) f9a076bff053100 Takashi Sakamoto 2017-06-09 719 goto _error; f9a076bff053100 Takashi Sakamoto 2017-06-09 720 0dba808eae2627f Takashi Iwai 2019-11-17 721 if (substream->managed_buffer_alloc) { 0dba808eae2627f Takashi Iwai 2019-11-17 722 err = snd_pcm_lib_malloc_pages(substream, 0dba808eae2627f Takashi Iwai 2019-11-17 723 params_buffer_bytes(params)); 0dba808eae2627f Takashi Iwai 2019-11-17 724 if (err < 0) 0dba808eae2627f Takashi Iwai 2019-11-17 725 goto _error; 0dba808eae2627f Takashi Iwai 2019-11-17 726 runtime->buffer_changed = err > 0; 0dba808eae2627f Takashi Iwai 2019-11-17 727 } 0dba808eae2627f Takashi Iwai 2019-11-17 728 ^1da177e4c3f415 Linus Torvalds 2005-04-16 729 if (substream->ops->hw_params != NULL) { ^1da177e4c3f415 Linus Torvalds 2005-04-16 730 err = substream->ops->hw_params(substream, params); ^1da177e4c3f415 Linus Torvalds 2005-04-16 731 if (err < 0) ^1da177e4c3f415 Linus Torvalds 2005-04-16 732 goto _error; ^1da177e4c3f415 Linus Torvalds 2005-04-16 733 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 734 ^1da177e4c3f415 Linus Torvalds 2005-04-16 735 runtime->access = params_access(params); ^1da177e4c3f415 Linus Torvalds 2005-04-16 736 runtime->format = params_format(params); ^1da177e4c3f415 Linus Torvalds 2005-04-16 737 runtime->subformat = params_subformat(params); ^1da177e4c3f415 Linus Torvalds 2005-04-16 738 runtime->channels = params_channels(params); ^1da177e4c3f415 Linus Torvalds 2005-04-16 739 runtime->rate = params_rate(params); ^1da177e4c3f415 Linus Torvalds 2005-04-16 740 runtime->period_size = params_period_size(params); ^1da177e4c3f415 Linus Torvalds 2005-04-16 741 runtime->periods = params_periods(params); ^1da177e4c3f415 Linus Torvalds 2005-04-16 742 runtime->buffer_size = params_buffer_size(params); ^1da177e4c3f415 Linus Torvalds 2005-04-16 743 runtime->info = params->info; ^1da177e4c3f415 Linus Torvalds 2005-04-16 744 runtime->rate_num = params->rate_num; ^1da177e4c3f415 Linus Torvalds 2005-04-16 745 runtime->rate_den = params->rate_den; ab69a4904b5dd4d Clemens Ladisch 2010-11-15 746 runtime->no_period_wakeup = ab69a4904b5dd4d Clemens Ladisch 2010-11-15 747 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && ab69a4904b5dd4d Clemens Ladisch 2010-11-15 748 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); ^1da177e4c3f415 Linus Torvalds 2005-04-16 749 ^1da177e4c3f415 Linus Torvalds 2005-04-16 750 bits = snd_pcm_format_physical_width(runtime->format); ^1da177e4c3f415 Linus Torvalds 2005-04-16 751 runtime->sample_bits = bits; ^1da177e4c3f415 Linus Torvalds 2005-04-16 752 bits *= runtime->channels; ^1da177e4c3f415 Linus Torvalds 2005-04-16 753 runtime->frame_bits = bits; ^1da177e4c3f415 Linus Torvalds 2005-04-16 754 frames = 1; ^1da177e4c3f415 Linus Torvalds 2005-04-16 755 while (bits % 8 != 0) { ^1da177e4c3f415 Linus Torvalds 2005-04-16 756 bits *= 2; ^1da177e4c3f415 Linus Torvalds 2005-04-16 757 frames *= 2; ^1da177e4c3f415 Linus Torvalds 2005-04-16 758 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 759 runtime->byte_align = bits / 8; ^1da177e4c3f415 Linus Torvalds 2005-04-16 760 runtime->min_align = frames; ^1da177e4c3f415 Linus Torvalds 2005-04-16 761 ^1da177e4c3f415 Linus Torvalds 2005-04-16 762 /* Default sw params */ ^1da177e4c3f415 Linus Torvalds 2005-04-16 763 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; ^1da177e4c3f415 Linus Torvalds 2005-04-16 764 runtime->period_step = 1; ^1da177e4c3f415 Linus Torvalds 2005-04-16 765 runtime->control->avail_min = runtime->period_size; ^1da177e4c3f415 Linus Torvalds 2005-04-16 766 runtime->start_threshold = 1; ^1da177e4c3f415 Linus Torvalds 2005-04-16 767 runtime->stop_threshold = runtime->buffer_size; ^1da177e4c3f415 Linus Torvalds 2005-04-16 768 runtime->silence_threshold = 0; ^1da177e4c3f415 Linus Torvalds 2005-04-16 769 runtime->silence_size = 0; ead4046b2fdfd69 Clemens Ladisch 2010-05-21 770 runtime->boundary = runtime->buffer_size; ead4046b2fdfd69 Clemens Ladisch 2010-05-21 771 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) ead4046b2fdfd69 Clemens Ladisch 2010-05-21 772 runtime->boundary *= 2; ^1da177e4c3f415 Linus Torvalds 2005-04-16 773 add9d56d7b37815 Takashi Iwai 2019-12-11 774 /* clear the buffer for avoiding possible kernel info leaks */ 618de0f4ef11acd Takashi Iwai 2020-12-18 775 if (runtime->dma_area && !substream->ops->copy_user) { 618de0f4ef11acd Takashi Iwai 2020-12-18 776 size_t size = runtime->dma_bytes; 618de0f4ef11acd Takashi Iwai 2020-12-18 777 618de0f4ef11acd Takashi Iwai 2020-12-18 778 if (runtime->info & SNDRV_PCM_INFO_MMAP) 618de0f4ef11acd Takashi Iwai 2020-12-18 779 size = PAGE_ALIGN(size); 618de0f4ef11acd Takashi Iwai 2020-12-18 780 memset(runtime->dma_area, 0, size); 618de0f4ef11acd Takashi Iwai 2020-12-18 781 } add9d56d7b37815 Takashi Iwai 2019-12-11 782 ^1da177e4c3f415 Linus Torvalds 2005-04-16 783 snd_pcm_timer_resolution_change(substream); 9b0573c07f278e9 Takashi Iwai 2012-10-12 784 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); 9442e691e4aec85 Takashi Iwai 2006-09-30 785 5371a79be97caac Rafael J. Wysocki 2020-02-12 786 if (cpu_latency_qos_request_active(&substream->latency_pm_qos_req)) 5371a79be97caac Rafael J. Wysocki 2020-02-12 787 cpu_latency_qos_remove_request(&substream->latency_pm_qos_req); 137c171cf7ecf62 Takashi Iwai 2021-06-08 788 usecs = period_to_usecs(runtime); 137c171cf7ecf62 Takashi Iwai 2021-06-08 789 if (usecs >= 0) 5371a79be97caac Rafael J. Wysocki 2020-02-12 790 cpu_latency_qos_add_request(&substream->latency_pm_qos_req, 5371a79be97caac Rafael J. Wysocki 2020-02-12 791 usecs); ^1da177e4c3f415 Linus Torvalds 2005-04-16 792 return 0; ^1da177e4c3f415 Linus Torvalds 2005-04-16 793 _error: 25985edcedea639 Lucas De Marchi 2011-03-30 794 /* hardware might be unusable from this time, ^1da177e4c3f415 Linus Torvalds 2005-04-16 795 so we force application to retry to set ^1da177e4c3f415 Linus Torvalds 2005-04-16 796 the correct hardware parameter settings */ 9b0573c07f278e9 Takashi Iwai 2012-10-12 797 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); ^1da177e4c3f415 Linus Torvalds 2005-04-16 798 if (substream->ops->hw_free != NULL) ^1da177e4c3f415 Linus Torvalds 2005-04-16 799 substream->ops->hw_free(substream); 0dba808eae2627f Takashi Iwai 2019-11-17 800 if (substream->managed_buffer_alloc) 0dba808eae2627f Takashi Iwai 2019-11-17 801 snd_pcm_lib_free_pages(substream); ^1da177e4c3f415 Linus Torvalds 2005-04-16 802 return err; ^1da177e4c3f415 Linus Torvalds 2005-04-16 803 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 804 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org