Hi Abhijeet, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on 549738f15da0e5a00275977623be199fbbf7df50] url: https://github.com/0day-ci/linux/commits/Abhijeet-Badurkar/net-can-Introd... base: 549738f15da0e5a00275977623be199fbbf7df50 config: openrisc-randconfig-s031-20201015 (attached as .config) compiler: or1k-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-rc1-dirty # https://github.com/0day-ci/linux/commit/267876771a434b2be3278c2c87d36146c... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Abhijeet-Badurkar/net-can-Introduce-MEN-16Z192-00-CAN-controller-driver/20201005-192132 git checkout 267876771a434b2be3278c2c87d36146c0fac77d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=openrisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" drivers/net/can/men_z192_can.c:1071:21: sparse: expected void *addr vim +1057 drivers/net/can/men_z192_can.c 962 963 static int men_z192_probe(struct mcb_device *mdev, 964 const struct mcb_device_id *id) 965 { 966 struct device *dev = &mdev->dev; 967 struct men_z192 *priv; 968 struct net_device *ndev; 969 void __iomem *dev_base; 970 struct resource *mem; 971 u32 timebase; 972 int ret = 0; 973 int irq; 974 975 mem = mcb_request_mem(mdev, dev_name(dev)); 976 if (IS_ERR(mem)) { 977 dev_err(dev, "failed to request device memory"); 978 return PTR_ERR(mem); 979 } 980 981 dev_base = ioremap(mem->start, resource_size(mem)); 982 if (!dev_base) { 983 dev_err(dev, "failed to ioremap device memory"); 984 ret = -ENXIO; 985 goto out_release; 986 } 987 988 irq = mcb_get_irq(mdev); 989 if (irq <= 0) { 990 ret = -ENODEV; 991 goto out_unmap; 992 } 993 994 ndev = alloc_candev(sizeof(struct men_z192), 0); 995 if (!ndev) { 996 dev_err(dev, "failed to allocat the can device"); 997 ret = -ENOMEM; 998 goto out_unmap; 999 } 1000 1001 ndev->netdev_ops = &men_z192_netdev_ops; 1002 ndev->irq = irq; 1003 ndev->flags |= IFF_ECHO; 1004 1005 priv = netdev_priv(ndev); 1006 priv->ndev = ndev; 1007 priv->dev = dev; 1008 1009 priv->mem = mem; 1010 priv->dev_base = dev_base; 1011 priv->regs = priv->dev_base + MEN_Z192_REGS_OFFS; 1012 1013 timebase = readl(&priv->regs->timebase); 1014 if (!timebase) { 1015 dev_err(dev, "invalid timebase configured (timebase=%d)\n", 1016 timebase); 1017 ret = -EINVAL; 1018 goto out_free_candev; 1019 } 1020 1021 priv->can.clock.freq = timebase; 1022 priv->can.bittiming_const = &men_z192_bittiming_const; 1023 priv->can.do_set_mode = men_z192_set_mode; 1024 priv->can.do_get_berr_counter = men_z192_get_berr_counter; 1025 priv->can.ctrlmode_supported = CAN_CTRLMODE_LISTENONLY | 1026 CAN_CTRLMODE_3_SAMPLES | 1027 CAN_CTRLMODE_LOOPBACK; 1028 1029 spin_lock_init(&priv->lock); 1030 1031 netif_napi_add(ndev, &priv->napi, men_z192_poll, 1032 NAPI_POLL_WEIGHT); 1033 1034 skb_queue_head_init(&priv->echoq); 1035 1036 mcb_set_drvdata(mdev, ndev); 1037 SET_NETDEV_DEV(ndev, dev); 1038 1039 ndev->ethtool_ops = &men_z192_ethtool_ops; 1040 1041 ret = men_z192_register(ndev); 1042 if (ret) { 1043 dev_err(dev, "failed to register CAN device"); 1044 goto out_free_candev; 1045 } 1046 1047 devm_can_led_init(ndev); 1048 1049 dev_info(dev, "MEN 16z192 CAN driver successfully registered\n"); 1050 1051 return 0; 1052 1053 out_free_candev: 1054 netif_napi_del(&priv->napi); 1055 free_candev(ndev); 1056 out_unmap: 1058 out_release: 1059 mcb_release_mem(mem); 1060 return ret; 1061 } 1062 1063 static void men_z192_remove(struct mcb_device *mdev) 1064 { 1065 struct net_device *ndev = mcb_get_drvdata(mdev); 1066 struct men_z192 *priv = netdev_priv(ndev); 1067 1068 unregister_candev(ndev); 1069 netif_napi_del(&priv->napi); 1070 1072 mcb_release_mem(priv->mem); 1073 1074 free_candev(ndev); 1075 } 1076 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org