Hi Xie,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on vhost/linux-next]
[cannot apply to iommu/next lwn/docs-next linus/master v5.14 next-20210830]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Xie-Yongji/Introduce-VDUSE-vDPA-Device-in-Userspace/20210830-222539
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next
config: i386-randconfig-a003-20210830 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 4b1fde8a2b681dad2ce0c082a5d6422caa06b0bc)
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
        # https://github.com/0day-ci/linux/commit/6e5e4d1644120efbf84d53cdf478d49e59643259
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Xie-Yongji/Introduce-VDUSE-vDPA-Device-in-Userspace/20210830-222539
        git checkout 6e5e4d1644120efbf84d53cdf478d49e59643259
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All warnings (new ones prefixed by >>):

quoted

drivers/vdpa/ifcvf/ifcvf_main.c:259:3: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation]

                   ifcvf_free_irq(adapter, vf->nr_vring);
                   ^
   drivers/vdpa/ifcvf/ifcvf_main.c:257:2: note: previous statement is here
           if (status_old & VIRTIO_CONFIG_S_DRIVER_OK)
           ^
   drivers/vdpa/ifcvf/ifcvf_main.c:260:2: error: non-void function does not return a value in all control paths [-Werror,-Wreturn-type]
           }
           ^

quoted

drivers/vdpa/ifcvf/ifcvf_main.c:262:2: warning: declaration specifier missing, defaulting to 'int'

           ifcvf_reset_vring(adapter);
           ^
           int
   drivers/vdpa/ifcvf/ifcvf_main.c:262:20: error: a parameter list without types is only allowed in a function definition
           ifcvf_reset_vring(adapter);
                             ^
   drivers/vdpa/ifcvf/ifcvf_main.c:264:2: error: expected identifier or '('
           return 0;
           ^
   drivers/vdpa/ifcvf/ifcvf_main.c:265:1: error: extraneous closing brace ('}')
   }
   ^

quoted

drivers/vdpa/ifcvf/ifcvf_main.c:617:39: warning: shift count >= width of type [-Wshift-count-overflow]

           ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
                                                ^~~~~~~~~~~~~~~~
   include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
   #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
                                                        ^ ~~~
   3 warnings and 4 errors generated.


vim +/if +259 drivers/vdpa/ifcvf/ifcvf_main.c

   243	
   244	static int ifcvf_vdpa_reset(struct vdpa_device *vdpa_dev)
   245	{
   246		struct ifcvf_adapter *adapter;
   247		struct ifcvf_hw *vf;
   248		u8 status_old;
   249	
   250		vf  = vdpa_to_vf(vdpa_dev);
   251		adapter = vdpa_to_adapter(vdpa_dev);
   252		status_old = ifcvf_get_status(vf);
   253	
   254		if (status_old == 0)
   255			return 0;
   256	
   257		if (status_old & VIRTIO_CONFIG_S_DRIVER_OK)
   258			ifcvf_stop_datapath(adapter);
 > 259			ifcvf_free_irq(adapter, vf->nr_vring);
   260		}
   261	
 > 262		ifcvf_reset_vring(adapter);
   263	
   264		return 0;
   265	}
   266	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org