[linux-next:master 3480/6773] drivers/bus/mhi/pci_generic.c:276:25: warning: implicit conversion from 'unsigned long long' to 'dma_addr_t' (aka 'unsigned int') changes value from 18446744073709551615 to 4294967295

* [linux-next:master 3480/6773] drivers/bus/mhi/pci_generic.c:276:25: warning: implicit conversion from 'unsigned long long' to 'dma_addr_t' (aka 'unsigned int') changes value from 18446744073709551615 to 4294967295
@ 2020-11-18 16:29 ` kernel test robot
  0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2020-11-18 16:29 UTC (permalink / raw)
  To: Loic Poulain
  Cc: kbuild-all, clang-built-linux, Linux Memory Management List,
	Manivannan Sadhasivam, Bhaumik Bhatt, Hemant Kumar

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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/commit/?id=c40eadc74f43c5d41c3ae94081248c18bf606cb3
        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@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/bus/mhi/pci_generic.c:276:25: warning: implicit conversion from 'unsigned long long' to 'dma_addr_t' (aka 'unsigned int') changes value from 18446744073709551615 to 4294967295 [-Wconstant-conversion]
           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;
 > 276		mhi_cntrl->iova_stop = DMA_BIT_MASK(info->dma_data_width);
   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

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