CC: [email protected] CC: [email protected] CC: [email protected] TO: Bard Liao <[email protected]> CC: Mark Brown <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9ff50bf2f2ff5fab01cac26d8eed21a89308e6ef commit: 349dd23931d1943b1083182e35715eba8b150fe1 ASoC: max98373: don't access volatile registers in bias level off date: 8 months ago :::::: branch date: 26 hours ago :::::: commit date: 8 months ago config: arm-randconfig-c002-20210816 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 44d0a99a12ec7ead4d2f5ef649ba05b40f6d463d) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=349dd23931d1943b1083182e35715eba8b150fe1 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 349dd23931d1943b1083182e35715eba8b150fe1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm clang-analyzer If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> clang-analyzer warnings: (new ones prefixed by >>) if (!fbdata->ready && fbdata->picolcd) ^ drivers/hid/hid-picolcd_fb.c:247:2: note: Loop condition is true. Entering loop body for (chip = 0; chip < 4; chip++) ^ drivers/hid/hid-picolcd_fb.c:248:3: note: Loop condition is true. Entering loop body for (tile = 0; tile < 8; tile++) { ^ drivers/hid/hid-picolcd_fb.c:249:8: note: Assuming field 'force' is 0 if (!fbdata->force && !picolcd_fb_update_tile( ^~~~~~~~~~~~~~ drivers/hid/hid-picolcd_fb.c:249:8: note: Left side of '&&' is true drivers/hid/hid-picolcd_fb.c:249:27: note: Calling 'picolcd_fb_update_tile' if (!fbdata->force && !picolcd_fb_update_tile( ^~~~~~~~~~~~~~~~~~~~~~~ drivers/hid/hid-picolcd_fb.c:148:6: note: Assuming 'bpp' is equal to 1 if (bpp == 1) { ^~~~~~~~ drivers/hid/hid-picolcd_fb.c:148:2: note: Taking true branch if (bpp == 1) { ^ drivers/hid/hid-picolcd_fb.c:149:3: note: Loop condition is true. Entering loop body for (b = 7; b >= 0; b--) { ^ drivers/hid/hid-picolcd_fb.c:151:9: note: The value 0 is assigned to 'i' for (i = 0; i < 64; i++) { ^~~~~ drivers/hid/hid-picolcd_fb.c:151:4: note: Loop condition is true. Entering loop body for (i = 0; i < 64; i++) { ^ drivers/hid/hid-picolcd_fb.c:152:14: note: The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage tdata[i] <<= 1; ~~~~~~~~ ^ drivers/hid/hid-picolcd_fb.c:160:14: warning: The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage [clang-analyzer-core.uninitialized.Assign] tdata[i] <<= 1; ^ drivers/hid/hid-picolcd_fb.c:437:2: note: Calling 'picolcd_fb_update' picolcd_fb_update(info); ^~~~~~~~~~~~~~~~~~~~~~~ drivers/hid/hid-picolcd_fb.c:234:2: note: Loop condition is false. Exiting loop spin_lock_irqsave(&fbdata->lock, flags); ^ include/linux/spinlock.h:384:2: note: expanded from macro 'spin_lock_irqsave' raw_spin_lock_irqsave(spinlock_check(lock), flags); \ ^ include/linux/spinlock.h:250:2: note: expanded from macro 'raw_spin_lock_irqsave' do { \ ^ drivers/hid/hid-picolcd_fb.c:234:2: note: Loop condition is false. Exiting loop spin_lock_irqsave(&fbdata->lock, flags); ^ include/linux/spinlock.h:382:43: note: expanded from macro 'spin_lock_irqsave' #define spin_lock_irqsave(lock, flags) \ ^ drivers/hid/hid-picolcd_fb.c:235:6: note: Assuming field 'ready' is not equal to 0 if (!fbdata->ready && fbdata->picolcd) ^~~~~~~~~~~~~~ drivers/hid/hid-picolcd_fb.c:235:21: note: Left side of '&&' is false if (!fbdata->ready && fbdata->picolcd) ^ drivers/hid/hid-picolcd_fb.c:247:2: note: Loop condition is true. Entering loop body for (chip = 0; chip < 4; chip++) ^ drivers/hid/hid-picolcd_fb.c:248:3: note: Loop condition is true. Entering loop body for (tile = 0; tile < 8; tile++) { ^ drivers/hid/hid-picolcd_fb.c:249:8: note: Assuming field 'force' is 0 if (!fbdata->force && !picolcd_fb_update_tile( ^~~~~~~~~~~~~~ drivers/hid/hid-picolcd_fb.c:249:8: note: Left side of '&&' is true drivers/hid/hid-picolcd_fb.c:249:27: note: Calling 'picolcd_fb_update_tile' if (!fbdata->force && !picolcd_fb_update_tile( ^~~~~~~~~~~~~~~~~~~~~~~ drivers/hid/hid-picolcd_fb.c:148:6: note: Assuming 'bpp' is not equal to 1 if (bpp == 1) { ^~~~~~~~ drivers/hid/hid-picolcd_fb.c:148:2: note: Taking false branch if (bpp == 1) { ^ drivers/hid/hid-picolcd_fb.c:156:13: note: Assuming 'bpp' is equal to 8 } else if (bpp == 8) { ^~~~~~~~ drivers/hid/hid-picolcd_fb.c:156:9: note: Taking true branch } else if (bpp == 8) { ^ drivers/hid/hid-picolcd_fb.c:157:3: note: Loop condition is true. Entering loop body for (b = 7; b >= 0; b--) { ^ drivers/hid/hid-picolcd_fb.c:159:9: note: The value 0 is assigned to 'i' for (i = 0; i < 64; i++) { ^~~~~ drivers/hid/hid-picolcd_fb.c:159:4: note: Loop condition is true. Entering loop body for (i = 0; i < 64; i++) { ^ drivers/hid/hid-picolcd_fb.c:160:14: note: The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage tdata[i] <<= 1; ~~~~~~~~ ^ Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. >> sound/soc/codecs/max98373-sdw.c:789:26: warning: Assigned value is garbage >> or undefined [clang-analyzer-core.uninitialized.Assign] max98373->cache[i].reg = max98373_sdw_cache_reg[i]; ^ sound/soc/codecs/max98373-sdw.c:854:2: note: Taking false branch if (IS_ERR(regmap)) ^ sound/soc/codecs/max98373-sdw.c:857:9: note: Calling 'max98373_init' return max98373_init(slave, regmap); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ sound/soc/codecs/max98373-sdw.c:776:6: note: Assuming 'max98373' is non-null if (!max98373) ^~~~~~~~~ sound/soc/codecs/max98373-sdw.c:776:2: note: Taking false branch if (!max98373) ^ sound/soc/codecs/max98373-sdw.c:788:14: note: Assuming 'i' is < field 'cache_num' for (i = 0; i < max98373->cache_num; i++) ^~~~~~~~~~~~~~~~~~~~~~~ sound/soc/codecs/max98373-sdw.c:788:2: note: Loop condition is true. Entering loop body for (i = 0; i < max98373->cache_num; i++) ^ sound/soc/codecs/max98373-sdw.c:788:14: note: Assuming 'i' is < field 'cache_num' for (i = 0; i < max98373->cache_num; i++) ^~~~~~~~~~~~~~~~~~~~~~~ sound/soc/codecs/max98373-sdw.c:788:2: note: Loop condition is true. Entering loop body for (i = 0; i < max98373->cache_num; i++) ^ sound/soc/codecs/max98373-sdw.c:788:14: note: Assuming 'i' is < field 'cache_num' for (i = 0; i < max98373->cache_num; i++) ^~~~~~~~~~~~~~~~~~~~~~~ sound/soc/codecs/max98373-sdw.c:788:2: note: Loop condition is true. Entering loop body for (i = 0; i < max98373->cache_num; i++) ^ sound/soc/codecs/max98373-sdw.c:788:39: note: The value 3 is assigned to 'i' for (i = 0; i < max98373->cache_num; i++) ^~~ sound/soc/codecs/max98373-sdw.c:788:14: note: Assuming 'i' is < field 'cache_num' for (i = 0; i < max98373->cache_num; i++) ^~~~~~~~~~~~~~~~~~~~~~~ sound/soc/codecs/max98373-sdw.c:788:2: note: Loop condition is true. Entering loop body for (i = 0; i < max98373->cache_num; i++) ^ sound/soc/codecs/max98373-sdw.c:789:26: note: Assigned value is garbage or undefined max98373->cache[i].reg = max98373_sdw_cache_reg[i]; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 7 warnings generated. sound/soc/codecs/wm8903.c:434:3: warning: Value stored to 'best' is never read [clang-analyzer-deadcode.DeadStores] best = 0; ^ ~ sound/soc/codecs/wm8903.c:434:3: note: Value stored to 'best' is never read best = 0; ^ ~ sound/soc/codecs/wm8903.c:1552:2: warning: Value stored to 'best_val' is never read [clang-analyzer-deadcode.DeadStores] best_val = ((clk_sys * 10) / bclk_divs[0].ratio) - bclk; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sound/soc/codecs/wm8903.c:1552:2: note: Value stored to 'best_val' is never read best_val = ((clk_sys * 10) / bclk_divs[0].ratio) - bclk; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sound/soc/codecs/wm8903.c:1559:3: warning: Value stored to 'best_val' is never read [clang-analyzer-deadcode.DeadStores] best_val = cur_val; ^ ~~~~~~~ sound/soc/codecs/wm8903.c:1559:3: note: Value stored to 'best_val' is never read best_val = cur_val; ^ ~~~~~~~ Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 6 warnings generated. sound/soc/codecs/wm8960.c:508:18: warning: Access to field 'lout1' results in a dereference of a null pointer (loaded from variable 'wm8960') [clang-analyzer-core.NullDereference] wm8960->lout1 = w; ^ sound/soc/codecs/wm8960.c:1349:6: note: Assuming field 'capless' is false if (pdata->capless) ^~~~~~~~~~~~~~ sound/soc/codecs/wm8960.c:1349:2: note: Taking false branch if (pdata->capless) ^ sound/soc/codecs/wm8960.c:1356:2: note: Calling 'wm8960_add_widgets' wm8960_add_widgets(component); vim +789 sound/soc/codecs/max98373-sdw.c 56a5b7910e965c Ryan Lee 2020-07-08 766 56a5b7910e965c Ryan Lee 2020-07-08 767 static int max98373_init(struct sdw_slave *slave, struct regmap *regmap) 56a5b7910e965c Ryan Lee 2020-07-08 768 { 56a5b7910e965c Ryan Lee 2020-07-08 769 struct max98373_priv *max98373; 56a5b7910e965c Ryan Lee 2020-07-08 770 int ret; 349dd23931d194 Bard Liao 2020-12-17 771 int i; 56a5b7910e965c Ryan Lee 2020-07-08 772 struct device *dev = &slave->dev; 56a5b7910e965c Ryan Lee 2020-07-08 773 56a5b7910e965c Ryan Lee 2020-07-08 774 /* Allocate and assign private driver data structure */ 56a5b7910e965c Ryan Lee 2020-07-08 775 max98373 = devm_kzalloc(dev, sizeof(*max98373), GFP_KERNEL); 56a5b7910e965c Ryan Lee 2020-07-08 776 if (!max98373) 56a5b7910e965c Ryan Lee 2020-07-08 777 return -ENOMEM; 56a5b7910e965c Ryan Lee 2020-07-08 778 56a5b7910e965c Ryan Lee 2020-07-08 779 dev_set_drvdata(dev, max98373); 56a5b7910e965c Ryan Lee 2020-07-08 780 max98373->regmap = regmap; 56a5b7910e965c Ryan Lee 2020-07-08 781 max98373->slave = slave; 56a5b7910e965c Ryan Lee 2020-07-08 782 349dd23931d194 Bard Liao 2020-12-17 783 max98373->cache_num = ARRAY_SIZE(max98373_sdw_cache_reg); 349dd23931d194 Bard Liao 2020-12-17 784 max98373->cache = devm_kcalloc(dev, max98373->cache_num, 349dd23931d194 Bard Liao 2020-12-17 785 sizeof(*max98373->cache), 349dd23931d194 Bard Liao 2020-12-17 786 GFP_KERNEL); 349dd23931d194 Bard Liao 2020-12-17 787 349dd23931d194 Bard Liao 2020-12-17 788 for (i = 0; i < max98373->cache_num; i++) 349dd23931d194 Bard Liao 2020-12-17 @789 max98373->cache[i].reg = max98373_sdw_cache_reg[i]; 349dd23931d194 Bard Liao 2020-12-17 790 56a5b7910e965c Ryan Lee 2020-07-08 791 /* Read voltage and slot configuration */ 56a5b7910e965c Ryan Lee 2020-07-08 792 max98373_slot_config(dev, max98373); 56a5b7910e965c Ryan Lee 2020-07-08 793 56a5b7910e965c Ryan Lee 2020-07-08 794 max98373->hw_init = false; 56a5b7910e965c Ryan Lee 2020-07-08 795 max98373->pm_init_once = false; 56a5b7910e965c Ryan Lee 2020-07-08 796 56a5b7910e965c Ryan Lee 2020-07-08 797 /* codec registration */ 56a5b7910e965c Ryan Lee 2020-07-08 798 ret = devm_snd_soc_register_component(dev, &soc_codec_dev_max98373_sdw, 56a5b7910e965c Ryan Lee 2020-07-08 799 max98373_sdw_dai, 56a5b7910e965c Ryan Lee 2020-07-08 800 ARRAY_SIZE(max98373_sdw_dai)); 56a5b7910e965c Ryan Lee 2020-07-08 801 if (ret < 0) 56a5b7910e965c Ryan Lee 2020-07-08 802 dev_err(dev, "Failed to register codec: %d\n", ret); 56a5b7910e965c Ryan Lee 2020-07-08 803 56a5b7910e965c Ryan Lee 2020-07-08 804 return ret; 56a5b7910e965c Ryan Lee 2020-07-08 805 } 56a5b7910e965c Ryan Lee 2020-07-08 806 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
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