On Fri, Jan 14, 2022 at 01:10:23AM +0800, kernel test robot wrote: > 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-the-OPEN-state-for-snd_pcm_stop/20220113-193304 > 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-lkp@xxxxxxxxx/config) > 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/18b89b55d815ee4e4f78fa96507d2ad7a03c9c8c > 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@xxxxxxxxx> > > All warnings (new ones prefixed by >>): > > >> sound/core/pcm_native.c:691:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] > 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; Small explanation in case there is some confusion on clang's warning. There should be a break here. GCC accepts implicitly falling through to cases with just a break or a return but the kernel requires all cases to end with either a break, fallthrough, continue, goto, or return. See Documentation/process/deprecated.rst. Cheers, Nathan > ^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@xxxxxxxxxxxx >
