Hi Fabio, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git test_ti head: 5b65781d06ea90ef2f8e51a13352c43c3daa8cdc commit: 0ab785c894e618587e83bb67e8a8e96649868ad1 [37/75] dmaengine: imx-dma: Remove unused .id_table config: arm64-randconfig-r032-20201214 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project d38205144febf4dc42c9270c6aa3d978f1ef65e1) 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/vkoul/dmaengine.git/commi... git remote add vkoul-dmaengine https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git git fetch --no-tags vkoul-dmaengine test_ti git checkout 0ab785c894e618587e83bb67e8a8e96649868ad1 # 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 >>): imxdma->devtype = (enum imx_dma_type)of_device_get_match_data(&pdev->dev); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. vim +1048 drivers/dma/imx-dma.c 1035 1036 static int __init imxdma_probe(struct platform_device *pdev) 1037 { 1038 struct imxdma_engine *imxdma; 1039 struct resource *res; 1040 int ret, i; 1041 int irq, irq_err; 1042 1043 imxdma = devm_kzalloc(&pdev->dev, sizeof(*imxdma), GFP_KERNEL); 1044 if (!imxdma) 1045 return -ENOMEM; 1046 1047 imxdma->dev = &pdev->dev; 1049 1050 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1051 imxdma->base = devm_ioremap_resource(&pdev->dev, res); 1052 if (IS_ERR(imxdma->base)) 1053 return PTR_ERR(imxdma->base); 1054 1055 irq = platform_get_irq(pdev, 0); 1056 if (irq < 0) 1057 return irq; 1058 1059 imxdma->dma_ipg = devm_clk_get(&pdev->dev, "ipg"); 1060 if (IS_ERR(imxdma->dma_ipg)) 1061 return PTR_ERR(imxdma->dma_ipg); 1062 1063 imxdma->dma_ahb = devm_clk_get(&pdev->dev, "ahb"); 1064 if (IS_ERR(imxdma->dma_ahb)) 1065 return PTR_ERR(imxdma->dma_ahb); 1066 1067 ret = clk_prepare_enable(imxdma->dma_ipg); 1068 if (ret) 1069 return ret; 1070 ret = clk_prepare_enable(imxdma->dma_ahb); 1071 if (ret) 1072 goto disable_dma_ipg_clk; 1073 1074 /* reset DMA module */ 1075 imx_dmav1_writel(imxdma, DCR_DRST, DMA_DCR); 1076 1077 if (is_imx1_dma(imxdma)) { 1078 ret = devm_request_irq(&pdev->dev, irq, 1079 dma_irq_handler, 0, "DMA", imxdma); 1080 if (ret) { 1081 dev_warn(imxdma->dev, "Can't register IRQ for DMA\n"); 1082 goto disable_dma_ahb_clk; 1083 } 1084 imxdma->irq = irq; 1085 1086 irq_err = platform_get_irq(pdev, 1); 1087 if (irq_err < 0) { 1088 ret = irq_err; 1089 goto disable_dma_ahb_clk; 1090 } 1091 1092 ret = devm_request_irq(&pdev->dev, irq_err, 1093 imxdma_err_handler, 0, "DMA", imxdma); 1094 if (ret) { 1095 dev_warn(imxdma->dev, "Can't register ERRIRQ for DMA\n"); 1096 goto disable_dma_ahb_clk; 1097 } 1098 imxdma->irq_err = irq_err; 1099 } 1100 1101 /* enable DMA module */ 1102 imx_dmav1_writel(imxdma, DCR_DEN, DMA_DCR); 1103 1104 /* clear all interrupts */ 1105 imx_dmav1_writel(imxdma, (1 << IMX_DMA_CHANNELS) - 1, DMA_DISR); 1106 1107 /* disable interrupts */ 1108 imx_dmav1_writel(imxdma, (1 << IMX_DMA_CHANNELS) - 1, DMA_DIMR); 1109 1110 INIT_LIST_HEAD(&imxdma->dma_device.channels); 1111 1112 dma_cap_set(DMA_SLAVE, imxdma->dma_device.cap_mask); 1113 dma_cap_set(DMA_CYCLIC, imxdma->dma_device.cap_mask); 1114 dma_cap_set(DMA_MEMCPY, imxdma->dma_device.cap_mask); 1115 dma_cap_set(DMA_INTERLEAVE, imxdma->dma_device.cap_mask); 1116 1117 /* Initialize 2D global parameters */ 1118 for (i = 0; i < IMX_DMA_2D_SLOTS; i++) 1119 imxdma->slots_2d[i].count = 0; 1120 1121 spin_lock_init(&imxdma->lock); 1122 1123 /* Initialize channel parameters */ 1124 for (i = 0; i < IMX_DMA_CHANNELS; i++) { 1125 struct imxdma_channel *imxdmac = &imxdma->channel[i]; 1126 1127 if (!is_imx1_dma(imxdma)) { 1128 ret = devm_request_irq(&pdev->dev, irq + i, 1129 dma_irq_handler, 0, "DMA", imxdma); 1130 if (ret) { 1131 dev_warn(imxdma->dev, "Can't register IRQ %d " 1132 "for DMA channel %d\n", 1133 irq + i, i); 1134 goto disable_dma_ahb_clk; 1135 } 1136 1137 imxdmac->irq = irq + i; 1138 timer_setup(&imxdmac->watchdog, imxdma_watchdog, 0); 1139 } 1140 1141 imxdmac->imxdma = imxdma; 1142 1143 INIT_LIST_HEAD(&imxdmac->ld_queue); 1144 INIT_LIST_HEAD(&imxdmac->ld_free); 1145 INIT_LIST_HEAD(&imxdmac->ld_active); 1146 1147 tasklet_setup(&imxdmac->dma_tasklet, imxdma_tasklet); 1148 imxdmac->chan.device = &imxdma->dma_device; 1149 dma_cookie_init(&imxdmac->chan); 1150 imxdmac->channel = i; 1151 1152 /* Add the channel to the DMAC list */ 1153 list_add_tail(&imxdmac->chan.device_node, 1154 &imxdma->dma_device.channels); 1155 } 1156 1157 imxdma->dma_device.dev = &pdev->dev; 1158 1159 imxdma->dma_device.device_alloc_chan_resources = imxdma_alloc_chan_resources; 1160 imxdma->dma_device.device_free_chan_resources = imxdma_free_chan_resources; 1161 imxdma->dma_device.device_tx_status = imxdma_tx_status; 1162 imxdma->dma_device.device_prep_slave_sg = imxdma_prep_slave_sg; 1163 imxdma->dma_device.device_prep_dma_cyclic = imxdma_prep_dma_cyclic; 1164 imxdma->dma_device.device_prep_dma_memcpy = imxdma_prep_dma_memcpy; 1165 imxdma->dma_device.device_prep_interleaved_dma = imxdma_prep_dma_interleaved; 1166 imxdma->dma_device.device_config = imxdma_config; 1167 imxdma->dma_device.device_terminate_all = imxdma_terminate_all; 1168 imxdma->dma_device.device_issue_pending = imxdma_issue_pending; 1169 1170 platform_set_drvdata(pdev, imxdma); 1171 1172 imxdma->dma_device.copy_align = DMAENGINE_ALIGN_4_BYTES; 1173 dma_set_max_seg_size(imxdma->dma_device.dev, 0xffffff); 1174 1175 ret = dma_async_device_register(&imxdma->dma_device); 1176 if (ret) { 1177 dev_err(&pdev->dev, "unable to register\n"); 1178 goto disable_dma_ahb_clk; 1179 } 1180 1181 if (pdev->dev.of_node) { 1182 ret = of_dma_controller_register(pdev->dev.of_node, 1183 imxdma_xlate, imxdma); 1184 if (ret) { 1185 dev_err(&pdev->dev, "unable to register of_dma_controller\n"); 1186 goto err_of_dma_controller; 1187 } 1188 } 1189 1190 return 0; 1191 1192 err_of_dma_controller: 1193 dma_async_device_unregister(&imxdma->dma_device); 1194 disable_dma_ahb_clk: 1195 clk_disable_unprepare(imxdma->dma_ahb); 1196 disable_dma_ipg_clk: 1197 clk_disable_unprepare(imxdma->dma_ipg); 1198 return ret; 1199 } 1200 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org