[leon-rdma:dmabuf-vfio 39/44] arch/powerpc/platforms/ps3/system-bus.c:594:3: warning: non-void function 'ps3_ioc0_map_phys' should return a value

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git dmabuf-vfio
head:   d42f66e173967159357a213dd04777137478de3b
commit: 05219b5f489decdb1f4b89b4eeaf14206d2a3f39 [39/44] powerpc: Convert to physical address DMA mapping
config: powerpc-allyesconfig (https://download.01.org/0day-ci/archive/20250920/202509200518.VAevT8GF-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 7c861bcedf61607b6c087380ac711eb7ff918ca6)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250920/202509200518.VAevT8GF-lkp@intel.com/reproduce)

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/202509200518.VAevT8GF-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from <built-in>:3:
   In file included from include/linux/compiler_types.h:171:
   include/linux/compiler-clang.h:28:9: warning: '__SANITIZE_ADDRESS__' macro redefined [-Wmacro-redefined]
      28 | #define __SANITIZE_ADDRESS__
         |         ^
   <built-in>:352:9: note: previous definition is here
     352 | #define __SANITIZE_ADDRESS__ 1
         |         ^
>> arch/powerpc/platforms/ps3/system-bus.c:594:3: warning: non-void function 'ps3_ioc0_map_phys' should return a value [-Wreturn-mismatch]
     594 |                 return;
         |                 ^
   2 warnings generated.


vim +/ps3_ioc0_map_phys +594 arch/powerpc/platforms/ps3/system-bus.c

   581	
   582	static dma_addr_t ps3_ioc0_map_phys(struct device *_dev, phys_addr_t phys,
   583					    size_t size,
   584					    enum dma_data_direction direction,
   585					    unsigned long attrs)
   586	{
   587		struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
   588		int result;
   589		dma_addr_t bus_addr;
   590		u64 iopte_flag;
   591		void *ptr = phys_to_virt(phys);
   592	
   593		if (attrs & DMA_ATTR_MMIO)
 > 594			return;
   595	
   596		iopte_flag = CBE_IOPTE_M;
   597		switch (direction) {
   598		case DMA_BIDIRECTIONAL:
   599			iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
   600			break;
   601		case DMA_TO_DEVICE:
   602			iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_SO_R;
   603			break;
   604		case DMA_FROM_DEVICE:
   605			iopte_flag |= CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
   606			break;
   607		default:
   608			/* not happened */
   609			BUG();
   610		}
   611		result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
   612				     &bus_addr, iopte_flag);
   613	
   614		if (result) {
   615			pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
   616				__func__, __LINE__, result);
   617		}
   618		return bus_addr;
   619	}
   620	

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