tree: https://github.com/frank-w/BPI-R2-4.14 5.15-rtl8367dsa head: c795ca3e9bf72973b4819834fac0728a9108f600 commit: 6c61ebc583fdb65eefc6724a48fac393db2a233d [28/43] net: dsa: add rtl8367rb config: hexagon-buildonly-randconfig-r003-20211114 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c3dddeeafb529e769cde87bd29ef6271ac6bfa5c) 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/frank-w/BPI-R2-4.14/commit/6c61ebc583fdb65eefc6724a48f... git remote add frank-w-bpi-r2-4.14 https://github.com/frank-w/BPI-R2-4.14 git fetch --no-tags frank-w-bpi-r2-4.14 5.15-rtl8367dsa git checkout 6c61ebc583fdb65eefc6724a48fac393db2a233d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon 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 >>): default: ^~~~~~~ drivers/net/dsa/rtl8367rb.c:933:47: note: uninitialized use occurs here ret = rtl8367b_write_initvals(smi, initvals, count); ^~~~~ drivers/net/dsa/rtl8367rb.c:887:11: note: initialize the variable 'count' to silence this warning int count; ^ = 0 1 warning generated. vim +/count +929 drivers/net/dsa/rtl8367rb.c 878 879 static int rtl8367rb_setup(struct dsa_switch *ds) 880 { 881 struct realtek_smi *smi = ds->priv; 882 const struct rtl8367b_initval *initvals; 883 struct rtl8367rb *rb; 884 const char *chip_name; 885 u32 chip_ver = 0; 886 u32 rlvid; 887 int count; 888 //u32 val; 889 int ret; 890 int i; 891 892 rb = smi->chip_data; 893 894 //REG_WR(smi, RTL8367B_RTL_MAGIC_ID_REG, RTL8367B_RTL_MAGIC_ID_VAL); 895 ret = regmap_read(smi->map, RTL8367RB_CHIP_VER_REG, 896 &chip_ver); 897 if (ret) { 898 dev_err(smi->dev, "unable to read chip version\n"); 899 return ret; 900 } 901 902 switch (chip_ver) { 903 case RTL8367RB_CHIP_VER_8367RB: 904 chip_name="8367RB"; 905 break; 906 case RTL8367RB_CHIP_VER_8367RVB: 907 chip_name="8367R-VB"; 908 break; 909 default: 910 dev_err(smi->dev, "unknown chip version (%04x)\n", chip_ver); 911 return -ENODEV; 912 } 913 914 rlvid = (chip_ver >> RTL8367RB_CHIP_VER_RLVID_SHIFT) & 915 RTL8367RB_CHIP_VER_RLVID_MASK; 916 dev_info(smi->dev, "RTL%s ver %u chip found\n", 917 chip_name, rlvid); 918 919 /* Do the init dance using the right jam table */ 920 switch (rlvid) { 921 case 0: 922 initvals = rtl8367r_vb_initvals_0; 923 count = ARRAY_SIZE(rtl8367r_vb_initvals_0); 924 break; 925 case 1: 926 initvals = rtl8367r_vb_initvals_1; 927 count = ARRAY_SIZE(rtl8367r_vb_initvals_1); 928 break; 930 break; 931 } 932 933 ret = rtl8367b_write_initvals(smi, initvals, count); 934 if (ret) 935 return ret; 936 937 /* Set up the "green ethernet" feature */ 938 /*ret = rtl8367rb_jam_table(rtl8367rb_green_jam, 939 ARRAY_SIZE(rtl8367rb_green_jam), smi, false); 940 if (ret) 941 return ret; 942 943 ret = regmap_write(smi->map, 944 RTL8367RB_GREEN_FEATURE_REG, 945 (chip_ver == 1) ? 0x0007 : 0x0003); 946 if (ret) 947 return ret;*/ 948 949 /* Set some random MAC address */ 950 ret = rtl8367rb_set_addr(smi); 951 if (ret) 952 return ret; 953 954 /* Enable CPU port with custom DSA tag 8899. 955 * 956 * If you set RTL8368RB_CPU_NO_TAG (bit 15) in this registers 957 * the custom tag is turned off. 958 */ 959 ret = regmap_update_bits(smi->map, RTL8368RB_CPU_CTRL_REG, 960 0xFFFF, 961 BIT(smi->cpu_port)); 962 if (ret) 963 return ret; 964 965 /* Make sure we default-enable the fixed CPU port */ 966 ret = regmap_update_bits(smi->map, RTL8367RB_PECR, 967 BIT(smi->cpu_port), 968 0); 969 if (ret) 970 return ret; 971 972 /* Set maximum packet length to 1536 bytes */ 973 ret = regmap_update_bits(smi->map, RTL8367RB_SGCR, 974 RTL8367RB_SGCR_MAX_LENGTH_MASK, 975 RTL8367RB_SGCR_MAX_LENGTH_1536); 976 if (ret) 977 return ret; 978 for (i = 0; i < RTL8367RB_NUM_PORTS; i++) 979 /* layer 2 size, see rtl8366rb_change_mtu() */ 980 rb->max_mtu[i] = 1532; 981 982 /* Enable learning for all ports */ 983 ret = regmap_write(smi->map, RTL8367RB_SSCR0, 0); 984 if (ret) 985 return ret; 986 987 /* Enable auto ageing for all ports */ 988 ret = regmap_write(smi->map, RTL8367RB_SSCR1, 0); 989 if (ret) 990 return ret; 991 992 /* Port 4 setup: this enables Port 4, usually the WAN port, 993 * common PHY IO mode is apparently mode 0, and this is not what 994 * the port is initialized to. There is no explanation of the 995 * IO modes in the Realtek source code, if your WAN port is 996 * connected to something exotic such as fiber, then this might 997 * be worth experimenting with. 998 */ 999 ret = regmap_update_bits(smi->map, RTL8367RB_PMC0, 1000 RTL8367RB_PMC0_P4_IOMODE_MASK, 1001 0 << RTL8367RB_PMC0_P4_IOMODE_SHIFT); 1002 if (ret) 1003 return ret; 1004 1005 /* Discard VLAN tagged packets if the port is not a member of 1006 * the VLAN with which the packets is associated. 1007 */ 1008 /*ret = regmap_write(smi->map, RTL8367RB_VLAN_INGRESS_CTRL2_REG, 1009 RTL8367RB_PORT_ALL); 1010 if (ret) 1011 return ret; 1012 */ 1013 /* Don't drop packets whose DA has not been learned */ 1014 ret = regmap_update_bits(smi->map, RTL8367RB_SSCR2, 1015 RTL8367RB_SSCR2_DROP_UNKNOWN_DA, 0); 1016 if (ret) 1017 return ret; 1018 1019 /* Set blinking, TODO: make this configurable */ 1020 /*ret = regmap_update_bits(smi->map, RTL8367RB_LED_BLINKRATE_REG, 1021 RTL8367RB_LED_BLINKRATE_MASK, 1022 RTL8367RB_LED_BLINKRATE_56MS); 1023 if (ret) 1024 return ret;*/ 1025 1026 /* Set up LED activity: 1027 * Each port has 4 LEDs, we configure all ports to the same 1028 * behaviour (no individual config) but we can set up each 1029 * LED separately. 1030 */ 1031 /*if (smi->leds_disabled) { 1032 // Turn everything off 1033 regmap_update_bits(smi->map, 1034 RTL8367RB_LED_0_1_CTRL_REG, 1035 0x0FFF, 0); 1036 regmap_update_bits(smi->map, 1037 RTL8367RB_LED_2_3_CTRL_REG, 1038 0x0FFF, 0); 1039 regmap_update_bits(smi->map, 1040 RTL8367RB_INTERRUPT_CONTROL_REG, 1041 RTL8367RB_P4_RGMII_LED, 1042 0); 1043 val = RTL8367RB_LED_OFF; 1044 } else { 1045 // TODO: make this configurable per LED 1046 val = RTL8367RB_LED_FORCE; 1047 } 1048 for (i = 0; i < 4; i++) { 1049 ret = regmap_update_bits(smi->map, 1050 RTL8367RB_LED_CTRL_REG, 1051 0xf << (i * 4), 1052 val << (i * 4)); 1053 if (ret) 1054 return ret; 1055 }*/ 1056 1057 /*ret = rtl8367_init_vlan(smi); 1058 if (ret) 1059 return ret; 1060 */ 1061 ret = rtl8367rb_setup_cascaded_irq(smi); 1062 if (ret) 1063 dev_info(smi->dev, "no interrupt support\n"); 1064 1065 ret = realtek_smi_setup_mdio(smi); 1066 if (ret) { 1067 dev_info(smi->dev, "could not set up MDIO bus\n"); 1068 return -ENODEV; 1069 } 1070 1071 ds->configure_vlan_while_not_filtering = false; 1072 1073 return 0; 1074 } 1075 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org