drivers/mmc/host/mxcmmc.c:1028:18: warning: cast to smaller integer type 'enum mxcmci_type' from 'const void *'

kernel test robot
2021-09-28T06:56:24Z

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 92477dd1faa650e50bd3bb35a6c0b8d09198cc35
commit: 8223e885e74b6424cd5b0ab1de4581ca017b7a4e mmc: mxc: Convert the driver to DT-only
date: 10 months ago
config: arm64-randconfig-r016-20210927 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498)
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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8223e885e74b6424cd5b0ab1de4581ca017b7a4e
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 W=1 ARCH=arm64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/mmc/host/mxcmmc.c:1028:18: warning: cast to smaller integer type 'enum mxcmci_type' from 'const void *' [-Wvoid-pointer-to-enum-cast]
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
> 1028 host->devtype = (enum mxcmci_type)of_device_get_match_data(&pdev->dev);
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

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