tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git pending-fixes head: 40cb4fecf2509da231deb989f67bca024e950981 commit: a9b0cb5780b96d0070401be281b532a6a74c19ea [483/519] mtd: rawnand: r852: Move the ECC initialization to ->attach_chip() config: x86_64-randconfig-r006-20201119 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 3ded927cf80ac519f9f9c4664fef08787f7c537d) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a9b0cb5780b96d0070401be281b532a6a74c19ea git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next pending-fixes git checkout a9b0cb5780b96d0070401be281b532a6a74c19ea # 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@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/mtd/nand/raw/r852.c:874:24: warning: variable 'dev' is uninitialized when used here [-Wuninitialized] nand_controller_init(&dev->controller); ^~~ drivers/mtd/nand/raw/r852.c:847:25: note: initialize the variable 'dev' to silence this warning struct r852_device *dev; ^ = NULL 1 warning generated. vim +/dev +874 drivers/mtd/nand/raw/r852.c 842 843 static int r852_probe(struct pci_dev *pci_dev, const struct pci_device_id *id) 844 { 845 int error; 846 struct nand_chip *chip; 847 struct r852_device *dev; 848 849 /* pci initialization */ 850 error = pci_enable_device(pci_dev); 851 852 if (error) 853 goto error1; 854 855 pci_set_master(pci_dev); 856 857 error = dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32)); 858 if (error) 859 goto error2; 860 861 error = pci_request_regions(pci_dev, DRV_NAME); 862 863 if (error) 864 goto error3; 865 866 error = -ENOMEM; 867 868 /* init nand chip, but register it only on card insert */ 869 chip = kzalloc(sizeof(struct nand_chip), GFP_KERNEL); 870 871 if (!chip) 872 goto error4; 873 > 874 nand_controller_init(&dev->controller); 875 dev->controller.ops = &r852_ops; 876 chip->controller = &dev->controller; 877 878 /* commands */ 879 chip->legacy.cmd_ctrl = r852_cmdctl; 880 chip->legacy.waitfunc = r852_wait; 881 chip->legacy.dev_ready = r852_ready; 882 883 /* I/O */ 884 chip->legacy.read_byte = r852_read_byte; 885 chip->legacy.read_buf = r852_read_buf; 886 chip->legacy.write_buf = r852_write_buf; 887 888 /* init our device structure */ 889 dev = kzalloc(sizeof(struct r852_device), GFP_KERNEL); 890 891 if (!dev) 892 goto error5; 893 894 nand_set_controller_data(chip, dev); 895 dev->chip = chip; 896 dev->pci_dev = pci_dev; 897 pci_set_drvdata(pci_dev, dev); 898 899 dev->bounce_buffer = dma_alloc_coherent(&pci_dev->dev, R852_DMA_LEN, 900 &dev->phys_bounce_buffer, GFP_KERNEL); 901 902 if (!dev->bounce_buffer) 903 goto error6; 904 905 906 error = -ENODEV; 907 dev->mmio = pci_ioremap_bar(pci_dev, 0); 908 909 if (!dev->mmio) 910 goto error7; 911 912 error = -ENOMEM; 913 dev->tmp_buffer = kzalloc(SM_SECTOR_SIZE, GFP_KERNEL); 914 915 if (!dev->tmp_buffer) 916 goto error8; 917 918 init_completion(&dev->dma_done); 919 920 dev->card_workqueue = create_freezable_workqueue(DRV_NAME); 921 922 if (!dev->card_workqueue) 923 goto error9; 924 925 INIT_DELAYED_WORK(&dev->card_detect_work, r852_card_detect_work); 926 927 /* shutdown everything - precation */ 928 r852_engine_disable(dev); 929 r852_disable_irqs(dev); 930 931 r852_dma_test(dev); 932 933 dev->irq = pci_dev->irq; 934 spin_lock_init(&dev->irqlock); 935 936 dev->card_detected = 0; 937 r852_card_update_present(dev); 938 939 /*register irq handler*/ 940 error = -ENODEV; 941 if (request_irq(pci_dev->irq, &r852_irq, IRQF_SHARED, 942 DRV_NAME, dev)) 943 goto error10; 944 945 /* kick initial present test */ 946 queue_delayed_work(dev->card_workqueue, 947 &dev->card_detect_work, 0); 948 949 950 pr_notice("driver loaded successfully\n"); 951 return 0; 952 953 error10: 954 destroy_workqueue(dev->card_workqueue); 955 error9: 956 kfree(dev->tmp_buffer); 957 error8: 958 pci_iounmap(pci_dev, dev->mmio); 959 error7: 960 dma_free_coherent(&pci_dev->dev, R852_DMA_LEN, dev->bounce_buffer, 961 dev->phys_bounce_buffer); 962 error6: 963 kfree(dev); 964 error5: 965 kfree(chip); 966 error4: 967 pci_release_regions(pci_dev); 968 error3: 969 error2: 970 pci_disable_device(pci_dev); 971 error1: 972 return error; 973 } 974 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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