Hi Takashi, I love your patch! Perhaps something to improve: [auto build test WARNING on sound/for-next] [also build test WARNING on v5.14-rc1 next-20210713] [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/Takashi-Iwai/ALSA-More-devres-us... base: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next config: arm64-buildonly-randconfig-r003-20210713 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8d69635ed9ecf36fd0ca85906bfde17949671cbe) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/2fe9eb4f2c4739f0452db5aee6618679d... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Takashi-Iwai/ALSA-More-devres-usages/20210713-225131 git checkout 2fe9eb4f2c4739f0452db5aee6618679da3adc73 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 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 >>): chip->card = card; ^~~~ sound/pci/via82xx_modem.c:1067:28: note: initialize the variable 'chip' to silence this warning struct via82xx_modem *chip; ^ = NULL 1 warning generated. vim +/chip +1075 sound/pci/via82xx_modem.c ^1da177e4c3f41 Linus Torvalds 2005-04-16 1060 e23e7a14362072 Bill Pemberton 2012-12-06 1061 static int snd_via82xx_create(struct snd_card *card, ^1da177e4c3f41 Linus Torvalds 2005-04-16 1062 struct pci_dev *pci, ^1da177e4c3f41 Linus Torvalds 2005-04-16 1063 int chip_type, ^1da177e4c3f41 Linus Torvalds 2005-04-16 1064 int revision, 2fe9eb4f2c4739 Takashi Iwai 2021-07-13 1065 unsigned int ac97_clock) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1066 { e437e3d7c7fb65 Takashi Iwai 2005-11-17 1067 struct via82xx_modem *chip; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1068 int err; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1069 2fe9eb4f2c4739 Takashi Iwai 2021-07-13 1070 err = pcim_enable_device(pci); afb342f02241a9 Takashi Iwai 2021-06-08 1071 if (err < 0) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1072 return err; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1073 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1074 spin_lock_init(&chip->reg_lock); ^1da177e4c3f41 Linus Torvalds 2005-04-16 @1075 chip->card = card; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1076 chip->pci = pci; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1077 chip->irq = -1; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1078 afb342f02241a9 Takashi Iwai 2021-06-08 1079 err = pci_request_regions(pci, card->driver); 2fe9eb4f2c4739 Takashi Iwai 2021-07-13 1080 if (err < 0) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1081 return err; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1082 chip->port = pci_resource_start(pci, 0); 2fe9eb4f2c4739 Takashi Iwai 2021-07-13 1083 if (devm_request_irq(&pci->dev, pci->irq, snd_via82xx_interrupt, 2fe9eb4f2c4739 Takashi Iwai 2021-07-13 1084 IRQF_SHARED, KBUILD_MODNAME, chip)) { 473439e06a2562 Takashi Iwai 2014-02-25 1085 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1086 return -EBUSY; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1087 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1088 chip->irq = pci->irq; c47583b0eb6847 Takashi Iwai 2019-12-10 1089 card->sync_irq = chip->irq; 2fe9eb4f2c4739 Takashi Iwai 2021-07-13 1090 card->private_free = snd_via82xx_free; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1091 if (ac97_clock >= 8000 && ac97_clock <= 48000) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1092 chip->ac97_clock = ac97_clock; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1093 afb342f02241a9 Takashi Iwai 2021-06-08 1094 err = snd_via82xx_chip_init(chip); 2fe9eb4f2c4739 Takashi Iwai 2021-07-13 1095 if (err < 0) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1096 return err; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1097 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1098 /* The 8233 ac97 controller does not implement the master bit ^1da177e4c3f41 Linus Torvalds 2005-04-16 1099 * in the pci command register. IMHO this is a violation of the PCI spec. ^1da177e4c3f41 Linus Torvalds 2005-04-16 1100 * We call pci_set_master here because it does not hurt. */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 1101 pci_set_master(pci); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1102 return 0; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1103 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1104 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org