[openeuler:openEuler-1.0-LTS 1513/1513] include/scsi/scsi_cmnd.h:327:12: warning: 'scsi_cmnd' may be used uninitialized in this function

[openeuler:openEuler-1.0-LTS 1513/1513] include/scsi/scsi_cmnd.h:327:12: warning: 'scsi_cmnd' may be used uninitialized in this function

[kernel test robot]

Hi chenxiang,

FYI, the error/warning still remains.

tree:   https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS
head:   256df080c8e0f3a9c8a5cc997ffc10fd5075dc6d
commit: b4adbc622b73d2bc61e6d712e0a916e568f0ce3f [1513/1513] scsi: hisi_sas: add support for DIF/DIX feature of v3 hw
config: arm64-randconfig-002-20250324 (https://download.01.org/0day-ci/archive/20250324/202503241626.r5trN0HW-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250324/202503241626.r5trN0HW-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/202503241626.r5trN0HW-lkp@intel.com/

Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings

All warnings (new ones prefixed by >>):

   In file included from include/scsi/libsas.h:36,
                    from include/scsi/sas_ata.h:29,
                    from drivers/scsi/hisi_sas/hisi_sas.h:27,
                    from drivers/scsi/hisi_sas/hisi_sas_main.c:12:
   drivers/scsi/hisi_sas/hisi_sas_main.c: In function 'hisi_sas_dif_dma_map':
>> include/scsi/scsi_cmnd.h:327:12: warning: 'scsi_cmnd' may be used uninitialized in this function [-Wmaybe-uninitialized]
     327 |  return cmd->prot_sdb ? cmd->prot_sdb->table.sgl : NULL;
         |         ~~~^~~~~~~~~~
   drivers/scsi/hisi_sas/hisi_sas_main.c:412:20: note: 'scsi_cmnd' was declared here
     412 |  struct scsi_cmnd *scsi_cmnd;
         |                    ^~~~~~~~~


vim +/scsi_cmnd +327 include/scsi/scsi_cmnd.h

7027ad72a68979 Martin K. Petersen 2008-07-17  324  
7027ad72a68979 Martin K. Petersen 2008-07-17  325  static inline struct scatterlist *scsi_prot_sglist(struct scsi_cmnd *cmd)
7027ad72a68979 Martin K. Petersen 2008-07-17  326  {
7027ad72a68979 Martin K. Petersen 2008-07-17 @327  	return cmd->prot_sdb ? cmd->prot_sdb->table.sgl : NULL;
7027ad72a68979 Martin K. Petersen 2008-07-17  328  }
7027ad72a68979 Martin K. Petersen 2008-07-17  329  

:::::: The code at line 327 was first introduced by commit
:::::: 7027ad72a689797475973c6feb5f0b673382f779 [SCSI] Support devices with protection information

:::::: TO: Martin K. Petersen <martin.petersen@oracle.com>
:::::: CC: James Bottomley <James.Bottomley@HansenPartnership.com>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki