tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 2052923327794192c5d884623b5ee5fec1867bda commit: c40eadc74f43c5d41c3ae94081248c18bf606cb3 [3480/6773] bus: mhi: Add MHI PCI support for WWAN modems config: powerpc64-randconfig-r011-20201118 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project b2613fb2f0f53691dd0211895afbb9413457fca7) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout c40eadc74f43c5d41c3ae94081248c18bf606cb3 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 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 >>): mhi_cntrl->iova_stop = DMA_BIT_MASK(info->dma_data_width); ~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:76:40: note: expanded from macro 'DMA_BIT_MASK' #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) ^~~~~ 1 warning generated. vim +276 drivers/bus/mhi/pci_generic.c 259 260 static int mhi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 261 { 262 const struct mhi_pci_dev_info *info = (struct mhi_pci_dev_info *) id->driver_data; 263 const struct mhi_controller_config *mhi_cntrl_config; 264 struct mhi_controller *mhi_cntrl; 265 int err; 266 267 dev_dbg(&pdev->dev, "MHI PCI device found: %s\n", info->name); 268 269 mhi_cntrl = mhi_alloc_controller(); 270 if (!mhi_cntrl) 271 return -ENOMEM; 272 273 mhi_cntrl_config = info->config; 274 mhi_cntrl->cntrl_dev = &pdev->dev; 275 mhi_cntrl->iova_start = 0; 277 mhi_cntrl->fw_image = info->fw; 278 mhi_cntrl->edl_image = info->edl; 279 280 mhi_cntrl->read_reg = mhi_pci_read_reg; 281 mhi_cntrl->write_reg = mhi_pci_write_reg; 282 mhi_cntrl->status_cb = mhi_pci_status_cb; 283 mhi_cntrl->runtime_get = mhi_pci_runtime_get; 284 mhi_cntrl->runtime_put = mhi_pci_runtime_put; 285 286 err = mhi_pci_claim(mhi_cntrl, info->bar_num, DMA_BIT_MASK(info->dma_data_width)); 287 if (err) 288 goto err_release; 289 290 err = mhi_pci_get_irqs(mhi_cntrl, mhi_cntrl_config); 291 if (err) 292 goto err_release; 293 294 pci_set_drvdata(pdev, mhi_cntrl); 295 296 err = mhi_register_controller(mhi_cntrl, mhi_cntrl_config); 297 if (err) 298 goto err_release; 299 300 /* MHI bus does not power up the controller by default */ 301 err = mhi_prepare_for_power_up(mhi_cntrl); 302 if (err) { 303 dev_err(&pdev->dev, "failed to prepare MHI controller\n"); 304 goto err_unregister; 305 } 306 307 err = mhi_sync_power_up(mhi_cntrl); 308 if (err) { 309 dev_err(&pdev->dev, "failed to power up MHI controller\n"); 310 goto err_unprepare; 311 } 312 313 return 0; 314 315 err_unprepare: 316 mhi_unprepare_after_power_down(mhi_cntrl); 317 err_unregister: 318 mhi_unregister_controller(mhi_cntrl); 319 err_release: 320 mhi_free_controller(mhi_cntrl); 321 322 return err; 323 } 324 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org