[linux-next:master 11904/14198] drivers/vfio/pci/vfio_pci_config.c:411:20: sparse: sparse: restricted pci_power_t degrades to integer

[linux-next:master 11904/14198] drivers/vfio/pci/vfio_pci_config.c:411:20: sparse: sparse: restricted pci_power_t degrades to integer

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   d3fde8ff50ab265749704bd7fbcf70d35235421f
commit: 2b2c651baf1c24414be4f76b152de80fae7c7786 [11904/14198] vfio/pci: Invalidate mmaps and block the access in D3hot power state
config: csky-randconfig-s032-20220524 (https://download.01.org/0day-ci/archive/20220528/202205281333.Mw1XyMXP-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 11.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-14-g5a0004b5-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=2b2c651baf1c24414be4f76b152de80fae7c7786
        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 2b2c651baf1c24414be4f76b152de80fae7c7786
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=csky SHELL=/bin/bash drivers/vfio/pci/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)
>> drivers/vfio/pci/vfio_pci_config.c:411:20: sparse: sparse: restricted pci_power_t degrades to integer
   drivers/vfio/pci/vfio_pci_config.c:411:38: sparse: sparse: restricted pci_power_t degrades to integer
   drivers/vfio/pci/vfio_pci_config.c:705:13: sparse: sparse: restricted pci_power_t degrades to integer
   drivers/vfio/pci/vfio_pci_config.c:705:22: sparse: sparse: restricted pci_power_t degrades to integer

vim +411 drivers/vfio/pci/vfio_pci_config.c

   397	
   398	/* Caller should hold memory_lock semaphore */
   399	bool __vfio_pci_memory_enabled(struct vfio_pci_core_device *vdev)
   400	{
   401		struct pci_dev *pdev = vdev->pdev;
   402		u16 cmd = le16_to_cpu(*(__le16 *)&vdev->vconfig[PCI_COMMAND]);
   403	
   404		/*
   405		 * Memory region cannot be accessed if device power state is D3.
   406		 *
   407		 * SR-IOV VF memory enable is handled by the MSE bit in the
   408		 * PF SR-IOV capability, there's therefore no need to trigger
   409		 * faults based on the virtual value.
   410		 */
 > 411		return pdev->current_state < PCI_D3hot &&
   412		       (pdev->no_command_memory || (cmd & PCI_COMMAND_MEMORY));
   413	}
   414	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp