[openeuler:OLK-6.6 9619/9677] arch/x86/kernel/zhaoxin_kh40000.c:87:33: warning: initialization of 'struct iommu_domain *' from 'int' makes pointer from integer without a cast

22 May 2024

      tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   f3f9407325616af0ea4e2399d86d31f8571fa55f
commit: 4332dbb07181359cccca3ba757ef54e434fb1296 [9619/9677] Add kh40000_direct_dma_ops for KH-40000 platform
config: x86_64-randconfig-102-20240521 (https://download.01.org/0day-ci/archive/20240522/202405220034.VMppwRxc-lkp@i...)
compiler: gcc-10 (Ubuntu 10.5.0-1ubuntu1) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240522/202405220034.VMppwRxc-lkp@i...)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405220034.VMppwRxc-lkp@intel.com/

All warnings (new ones prefixed by >>):

   arch/x86/kernel/zhaoxin_kh40000.c: In function 'kh40000_sync_single_dma_for_cpu':
   arch/x86/kernel/zhaoxin_kh40000.c:87:33: error: implicit declaration of function 'iommu_get_dma_domain'; did you mean 'iommu_is_dma_domain'? [-Werror=implicit-function-declaration]
      87 |   struct iommu_domain *domain = iommu_get_dma_domain(dev);
         |                                 ^~~~~~~~~~~~~~~~~~~~
         |                                 iommu_is_dma_domain
...
...
arch/x86/kernel/zhaoxin_kh40000.c:87:33: warning: initialization of 'struct iommu_domain *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
   cc1: some warnings being treated as errors
vim +87 arch/x86/kernel/zhaoxin_kh40000.c

    64	
    65	static void kh40000_sync_single_dma_for_cpu(struct device *dev, dma_addr_t paddr,
    66			enum dma_data_direction dir, bool is_iommu)
    67	{
    68		u8 vid;
    69		struct pci_dev *pci;
    70		u64 dma_mask = *dev->dma_mask;
    71	
    72		/* check direction */
    73		if ((dir != DMA_FROM_DEVICE) && (dir != DMA_BIDIRECTIONAL))
    74			return;
    75	
    76		/* check dma capability */
    77		if (dma_mask <= DMA_BIT_MASK(32))
    78			return;
    79	
    80		/* check device type */
    81		pci = kh40000_get_pci_dev(dev);
    82		if (pci == NULL)
    83			return;
    84	
    85		/* get real physical address */
    86		if (is_iommu) {
...
87			struct iommu_domain *domain = iommu_get_dma_domain(dev);
    88	
    89			paddr = iommu_iova_to_phys(domain, paddr);
    90			if (!paddr)
    91				return;
    92		}
    93	
    94		/* check node or not */
    95		if ((zhaoxin_patch_code & ZHAOXIN_P2CW_NODE_CHECK)
    96		   && pfn_to_nid(PFN_DOWN(paddr)) == dev_to_node(dev))
    97			return;
    98	
    99		/* flush data by one pci read cycle */
   100		pci_read_config_byte(pci, PCI_VENDOR_ID, &vid);
   101	}
   102
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