Hi Fabio, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: dfa377c35d70c31139b1274ec49f87d380996c42 commit: 8223e885e74b6424cd5b0ab1de4581ca017b7a4e mmc: mxc: Convert the driver to DT-only date: 9 months ago config: arm64-randconfig-r024-20210814 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 1f7b25ea76a925aca690da28de9d78db7ca99d0c) 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 8223e885e74b6424cd5b0ab1de4581ca017b7a4e # 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 >>): host->devtype = (enum mxcmci_type)of_device_get_match_data(&pdev->dev); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. vim +1028 drivers/mmc/host/mxcmmc.c 979 980 static int mxcmci_probe(struct platform_device *pdev) 981 { 982 struct mmc_host *mmc; 983 struct mxcmci_host *host; 984 struct resource *res; 985 int ret = 0, irq; 986 bool dat3_card_detect = false; 987 dma_cap_mask_t mask; 988 struct imxmmc_platform_data *pdata = pdev->dev.platform_data; 989 990 pr_info("i.MX/MPC512x SDHC driver\n"); 991 992 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 993 irq = platform_get_irq(pdev, 0); 994 if (irq < 0) 995 return irq; 996 997 mmc = mmc_alloc_host(sizeof(*host), &pdev->dev); 998 if (!mmc) 999 return -ENOMEM; 1000 1001 host = mmc_priv(mmc); 1002 1003 host->base = devm_ioremap_resource(&pdev->dev, res); 1004 if (IS_ERR(host->base)) { 1005 ret = PTR_ERR(host->base); 1006 goto out_free; 1007 } 1008 1009 host->phys_base = res->start; 1010 1011 ret = mmc_of_parse(mmc); 1012 if (ret) 1013 goto out_free; 1014 mmc->ops = &mxcmci_ops; 1015 1016 /* For devicetree parsing, the bus width is read from devicetree */ 1017 if (pdata) 1018 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; 1019 else 1020 mmc->caps |= MMC_CAP_SDIO_IRQ; 1021 1022 /* MMC core transfer sizes tunable parameters */ 1023 mmc->max_blk_size = 2048; 1024 mmc->max_blk_count = 65535; 1025 mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; 1026 mmc->max_seg_size = mmc->max_req_size; 1027 1029 1030 /* adjust max_segs after devtype detection */ 1031 if (!is_mpc512x_mmc(host)) 1032 mmc->max_segs = 64; 1033 1034 host->mmc = mmc; 1035 host->pdata = pdata; 1036 spin_lock_init(&host->lock); 1037 1038 if (pdata) 1039 dat3_card_detect = pdata->dat3_card_detect; 1040 else if (mmc_card_is_removable(mmc) 1041 && !of_property_read_bool(pdev->dev.of_node, "cd-gpios")) 1042 dat3_card_detect = true; 1043 1044 ret = mmc_regulator_get_supply(mmc); 1045 if (ret) 1046 goto out_free; 1047 1048 if (!mmc->ocr_avail) { 1049 if (pdata && pdata->ocr_avail) 1050 mmc->ocr_avail = pdata->ocr_avail; 1051 else 1052 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 1053 } 1054 1055 if (dat3_card_detect) 1056 host->default_irq_mask = 1057 INT_CARD_INSERTION_EN | INT_CARD_REMOVAL_EN; 1058 else 1059 host->default_irq_mask = 0; 1060 1061 host->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); 1062 if (IS_ERR(host->clk_ipg)) { 1063 ret = PTR_ERR(host->clk_ipg); 1064 goto out_free; 1065 } 1066 1067 host->clk_per = devm_clk_get(&pdev->dev, "per"); 1068 if (IS_ERR(host->clk_per)) { 1069 ret = PTR_ERR(host->clk_per); 1070 goto out_free; 1071 } 1072 1073 ret = clk_prepare_enable(host->clk_per); 1074 if (ret) 1075 goto out_free; 1076 1077 ret = clk_prepare_enable(host->clk_ipg); 1078 if (ret) 1079 goto out_clk_per_put; 1080 1081 mxcmci_softreset(host); 1082 1083 host->rev_no = mxcmci_readw(host, MMC_REG_REV_NO); 1084 if (host->rev_no != 0x400) { 1085 ret = -ENODEV; 1086 dev_err(mmc_dev(host->mmc), "wrong rev.no. 0x%08x. aborting.\n", 1087 host->rev_no); 1088 goto out_clk_put; 1089 } 1090 1091 mmc->f_min = clk_get_rate(host->clk_per) >> 16; 1092 mmc->f_max = clk_get_rate(host->clk_per) >> 1; 1093 1094 /* recommended in data sheet */ 1095 mxcmci_writew(host, 0x2db4, MMC_REG_READ_TO); 1096 1097 mxcmci_writel(host, host->default_irq_mask, MMC_REG_INT_CNTR); 1098 1099 if (!host->pdata) { 1100 host->dma = dma_request_chan(&pdev->dev, "rx-tx"); 1101 if (IS_ERR(host->dma)) { 1102 if (PTR_ERR(host->dma) == -EPROBE_DEFER) { 1103 ret = -EPROBE_DEFER; 1104 goto out_clk_put; 1105 } 1106 1107 /* Ignore errors to fall back to PIO mode */ 1108 host->dma = NULL; 1109 } 1110 } else { 1111 res = platform_get_resource(pdev, IORESOURCE_DMA, 0); 1112 if (res) { 1113 host->dmareq = res->start; 1114 host->dma_data.peripheral_type = IMX_DMATYPE_SDHC; 1115 host->dma_data.priority = DMA_PRIO_LOW; 1116 host->dma_data.dma_request = host->dmareq; 1117 dma_cap_zero(mask); 1118 dma_cap_set(DMA_SLAVE, mask); 1119 host->dma = dma_request_channel(mask, filter, host); 1120 } 1121 } 1122 if (host->dma) 1123 mmc->max_seg_size = dma_get_max_seg_size( 1124 host->dma->device->dev); 1125 else 1126 dev_info(mmc_dev(host->mmc), "dma not available. Using PIO\n"); 1127 1128 INIT_WORK(&host->datawork, mxcmci_datawork); 1129 1130 ret = devm_request_irq(&pdev->dev, irq, mxcmci_irq, 0, 1131 dev_name(&pdev->dev), host); 1132 if (ret) 1133 goto out_free_dma; 1134 1135 platform_set_drvdata(pdev, mmc); 1136 1137 if (host->pdata && host->pdata->init) { 1138 ret = host->pdata->init(&pdev->dev, mxcmci_detect_irq, 1139 host->mmc); 1140 if (ret) 1141 goto out_free_dma; 1142 } 1143 1144 timer_setup(&host->watchdog, mxcmci_watchdog, 0); 1145 1146 mmc_add_host(mmc); 1147 1148 return 0; 1149 1150 out_free_dma: 1151 if (host->dma) 1152 dma_release_channel(host->dma); 1153 1154 out_clk_put: 1155 clk_disable_unprepare(host->clk_ipg); 1156 out_clk_per_put: 1157 clk_disable_unprepare(host->clk_per); 1158 1159 out_free: 1160 mmc_free_host(mmc); 1161 1162 return ret; 1163 } 1164 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org