include/linux/pci_ids.h:19:41: warning: unsigned conversion from 'int' to 'unsigned char' changes value from '256' to '0'

include/linux/pci_ids.h:19:41: warning: unsigned conversion from 'int' to 'unsigned char' changes value from '256' to '0'

[kernel test robot]

tree:   https://github.com/intel-lab-lkp/linux/commits/alistair23-gmail-com/virtio_pci-Add-a-quirk-to-force-DMA-Map-API-for-certain-legacy-devices/20260901-114649
head:   3c8cbce2a30d266ce3f5ba5e91de82a74a2ca005
commit: 3c8cbce2a30d266ce3f5ba5e91de82a74a2ca005 scsi: Initial commit of VirtIO PCIe Endpoint Driver
date:   7 days ago
config: sparc-allyesconfig (https://download.01.org/0day-ci/archive/20260908/202609080411.ja1cXH2Z-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260908/202609080411.ja1cXH2Z-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/202609080411.ja1cXH2Z-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/scsi/virtio-scsi-pci-epf.c:23:
>> include/linux/pci_ids.h:19:41: warning: unsigned conversion from 'int' to 'unsigned char' changes value from '256' to '0' [-Woverflow]
      19 | #define PCI_CLASS_STORAGE_SCSI          0x0100
         |                                         ^~~~~~
   drivers/scsi/virtio-scsi-pci-epf.c:2642:27: note: in expansion of macro 'PCI_CLASS_STORAGE_SCSI'
    2642 |         .subclass_code  = PCI_CLASS_STORAGE_SCSI,
         |                           ^~~~~~~~~~~~~~~~~~~~~~


vim +19 include/linux/pci_ids.h

^1da177e4c3f41 Linus Torvalds    2005-04-16  17  
^1da177e4c3f41 Linus Torvalds    2005-04-16  18  #define PCI_BASE_CLASS_STORAGE		0x01
^1da177e4c3f41 Linus Torvalds    2005-04-16 @19  #define PCI_CLASS_STORAGE_SCSI		0x0100
^1da177e4c3f41 Linus Torvalds    2005-04-16  20  #define PCI_CLASS_STORAGE_IDE		0x0101
^1da177e4c3f41 Linus Torvalds    2005-04-16  21  #define PCI_CLASS_STORAGE_FLOPPY	0x0102
^1da177e4c3f41 Linus Torvalds    2005-04-16  22  #define PCI_CLASS_STORAGE_IPI		0x0103
^1da177e4c3f41 Linus Torvalds    2005-04-16  23  #define PCI_CLASS_STORAGE_RAID		0x0104
c9f89475a5b184 Conke Hu          2007-01-09  24  #define PCI_CLASS_STORAGE_SATA		0x0106
c9f89475a5b184 Conke Hu          2007-01-09  25  #define PCI_CLASS_STORAGE_SATA_AHCI	0x010601
4e06cbd42c41f9 Moore, Eric Dean  2005-12-01  26  #define PCI_CLASS_STORAGE_SAS		0x0107
a2e7eefd5618e0 Christoph Hellwig 2016-12-02  27  #define PCI_CLASS_STORAGE_EXPRESS	0x010802
^1da177e4c3f41 Linus Torvalds    2005-04-16  28  #define PCI_CLASS_STORAGE_OTHER		0x0180
^1da177e4c3f41 Linus Torvalds    2005-04-16  29  
a2e7eefd5618e0 Christoph Hellwig 2016-12-02  30  

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