Hi Amit, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on robh/for-next] [also build test WARNING on clk/clk-next pza/reset/next linus/master v5.8-rc3 next-20200702] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Amit-Singh-Tomar/Add-MMC-and-DMA-support-for-Actions-S700/20200702-225741 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: arm64-randconfig-r002-20200701 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 003a086ffc0d1affbb8300b36225fb8150a2d40a) 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 # 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@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/dma/owl-dma.c:1117:14: warning: cast to smaller integer type 'enum owl_dma_id' from 'const void *' [-Wvoid-pointer-to-enum-cast] od->devid = (enum owl_dma_id)of_device_get_match_data(&pdev->dev); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. vim +1117 drivers/dma/owl-dma.c 1087 1088 static int owl_dma_probe(struct platform_device *pdev) 1089 { 1090 struct device_node *np = pdev->dev.of_node; 1091 struct owl_dma *od; 1092 int ret, i, nr_channels, nr_requests; 1093 1094 od = devm_kzalloc(&pdev->dev, sizeof(*od), GFP_KERNEL); 1095 if (!od) 1096 return -ENOMEM; 1097 1098 od->base = devm_platform_ioremap_resource(pdev, 0); 1099 if (IS_ERR(od->base)) 1100 return PTR_ERR(od->base); 1101 1102 ret = of_property_read_u32(np, "dma-channels", &nr_channels); 1103 if (ret) { 1104 dev_err(&pdev->dev, "can't get dma-channels\n"); 1105 return ret; 1106 } 1107 1108 ret = of_property_read_u32(np, "dma-requests", &nr_requests); 1109 if (ret) { 1110 dev_err(&pdev->dev, "can't get dma-requests\n"); 1111 return ret; 1112 } 1113 1114 dev_info(&pdev->dev, "dma-channels %d, dma-requests %d\n", 1115 nr_channels, nr_requests); 1116 > 1117 od->devid = (enum owl_dma_id)of_device_get_match_data(&pdev->dev); 1118 1119 od->nr_pchans = nr_channels; 1120 od->nr_vchans = nr_requests; 1121 1122 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 1123 1124 platform_set_drvdata(pdev, od); 1125 spin_lock_init(&od->lock); 1126 1127 dma_cap_set(DMA_MEMCPY, od->dma.cap_mask); 1128 dma_cap_set(DMA_SLAVE, od->dma.cap_mask); 1129 dma_cap_set(DMA_CYCLIC, od->dma.cap_mask); 1130 1131 od->dma.dev = &pdev->dev; 1132 od->dma.device_free_chan_resources = owl_dma_free_chan_resources; 1133 od->dma.device_tx_status = owl_dma_tx_status; 1134 od->dma.device_issue_pending = owl_dma_issue_pending; 1135 od->dma.device_prep_dma_memcpy = owl_dma_prep_memcpy; 1136 od->dma.device_prep_slave_sg = owl_dma_prep_slave_sg; 1137 od->dma.device_prep_dma_cyclic = owl_prep_dma_cyclic; 1138 od->dma.device_config = owl_dma_config; 1139 od->dma.device_pause = owl_dma_pause; 1140 od->dma.device_resume = owl_dma_resume; 1141 od->dma.device_terminate_all = owl_dma_terminate_all; 1142 od->dma.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); 1143 od->dma.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); 1144 od->dma.directions = BIT(DMA_MEM_TO_MEM); 1145 od->dma.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; 1146 1147 INIT_LIST_HEAD(&od->dma.channels); 1148 1149 od->clk = devm_clk_get(&pdev->dev, NULL); 1150 if (IS_ERR(od->clk)) { 1151 dev_err(&pdev->dev, "unable to get clock\n"); 1152 return PTR_ERR(od->clk); 1153 } 1154 1155 /* 1156 * Eventhough the DMA controller is capable of generating 4 1157 * IRQ's for DMA priority feature, we only use 1 IRQ for 1158 * simplification. 1159 */ 1160 od->irq = platform_get_irq(pdev, 0); 1161 ret = devm_request_irq(&pdev->dev, od->irq, owl_dma_interrupt, 0, 1162 dev_name(&pdev->dev), od); 1163 if (ret) { 1164 dev_err(&pdev->dev, "unable to request IRQ\n"); 1165 return ret; 1166 } 1167 1168 /* Init physical channel */ 1169 od->pchans = devm_kcalloc(&pdev->dev, od->nr_pchans, 1170 sizeof(struct owl_dma_pchan), GFP_KERNEL); 1171 if (!od->pchans) 1172 return -ENOMEM; 1173 1174 for (i = 0; i < od->nr_pchans; i++) { 1175 struct owl_dma_pchan *pchan = &od->pchans[i]; 1176 1177 pchan->id = i; 1178 pchan->base = od->base + OWL_DMA_CHAN_BASE(i); 1179 } 1180 1181 /* Init virtual channel */ 1182 od->vchans = devm_kcalloc(&pdev->dev, od->nr_vchans, 1183 sizeof(struct owl_dma_vchan), GFP_KERNEL); 1184 if (!od->vchans) 1185 return -ENOMEM; 1186 1187 for (i = 0; i < od->nr_vchans; i++) { 1188 struct owl_dma_vchan *vchan = &od->vchans[i]; 1189 1190 vchan->vc.desc_free = owl_dma_desc_free; 1191 vchan_init(&vchan->vc, &od->dma); 1192 } 1193 1194 /* Create a pool of consistent memory blocks for hardware descriptors */ 1195 od->lli_pool = dma_pool_create(dev_name(od->dma.dev), od->dma.dev, 1196 sizeof(struct owl_dma_lli), 1197 __alignof__(struct owl_dma_lli), 1198 0); 1199 if (!od->lli_pool) { 1200 dev_err(&pdev->dev, "unable to allocate DMA descriptor pool\n"); 1201 return -ENOMEM; 1202 } 1203 1204 clk_prepare_enable(od->clk); 1205 1206 ret = dma_async_device_register(&od->dma); 1207 if (ret) { 1208 dev_err(&pdev->dev, "failed to register DMA engine device\n"); 1209 goto err_pool_free; 1210 } 1211 1212 /* Device-tree DMA controller registration */ 1213 ret = of_dma_controller_register(pdev->dev.of_node, 1214 owl_dma_of_xlate, od); 1215 if (ret) { 1216 dev_err(&pdev->dev, "of_dma_controller_register failed\n"); 1217 goto err_dma_unregister; 1218 } 1219 1220 return 0; 1221 1222 err_dma_unregister: 1223 dma_async_device_unregister(&od->dma); 1224 err_pool_free: 1225 clk_disable_unprepare(od->clk); 1226 dma_pool_destroy(od->lli_pool); 1227 1228 return ret; 1229 } 1230 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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