Re: [dm-devel] [PATCH v4 2/3] scsi: scsi_ioctl: add sg_io_to_blk_status()

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

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Hi,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on mkp-scsi/for-next]
[also build test WARNING on scsi/for-next next-20210628]
[cannot apply to dm/for-next block/for-next song-md/md-next v5.13]
[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/mwilck-suse-com/scsi-dm-dm_blk_ioctl-implement-failover-for-SG_IO-on-dm-multipath/20210628-175410
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next
config: x86_64-randconfig-r032-20210628 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 4c92e31dd0f1bd152eda883af20ff7fbcaa14945)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/259453ca972ae531cfdca07cbf4d6bb09b8f8c9f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review mwilck-suse-com/scsi-dm-dm_blk_ioctl-implement-failover-for-SG_IO-on-dm-multipath/20210628-175410
        git checkout 259453ca972ae531cfdca07cbf4d6bb09b8f8c9f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> block/scsi_ioctl.c:937:6: warning: logical not is only applied to the left hand side of this bitwise operator [-Wlogical-not-parentheses]
           if (!hdr->info & SG_INFO_CHECK)
               ^          ~
   include/linux/compiler.h:56:47: note: expanded from macro 'if'
   #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
                                                 ^~~~
   include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
   #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                                      ^~~~
   block/scsi_ioctl.c:937:6: note: add parentheses after the '!' to evaluate the bitwise operator first
   block/scsi_ioctl.c:937:6: note: add parentheses around left hand side expression to silence this warning
>> block/scsi_ioctl.c:937:6: warning: logical not is only applied to the left hand side of this bitwise operator [-Wlogical-not-parentheses]
           if (!hdr->info & SG_INFO_CHECK)
               ^          ~
   include/linux/compiler.h:56:47: note: expanded from macro 'if'
   #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
                                                 ^~~~
   include/linux/compiler.h:58:61: note: expanded from macro '__trace_if_var'
   #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                                               ^~~~
   block/scsi_ioctl.c:937:6: note: add parentheses after the '!' to evaluate the bitwise operator first
   block/scsi_ioctl.c:937:6: note: add parentheses around left hand side expression to silence this warning
>> block/scsi_ioctl.c:937:6: warning: logical not is only applied to the left hand side of this bitwise operator [-Wlogical-not-parentheses]
           if (!hdr->info & SG_INFO_CHECK)
               ^          ~
   include/linux/compiler.h:56:47: note: expanded from macro 'if'
   #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
                                                 ^~~~
   include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
   #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                                                                        ^~~~
   include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
           (cond) ?                                        \
            ^~~~
   block/scsi_ioctl.c:937:6: note: add parentheses after the '!' to evaluate the bitwise operator first
   block/scsi_ioctl.c:937:6: note: add parentheses around left hand side expression to silence this warning
   3 warnings generated.


vim +937 block/scsi_ioctl.c

   931	
   932	blk_status_t sg_io_to_blk_status(struct sg_io_hdr *hdr)
   933	{
   934		int result;
   935		blk_status_t sts;
   936	
 > 937		if (!hdr->info & SG_INFO_CHECK)
   938			return BLK_STS_OK;
   939	
   940		result = hdr->status |
   941			(hdr->msg_status << 8) |
   942			(hdr->host_status << 16) |
   943			(hdr->driver_status << 24);
   944	
   945		sts = __scsi_result_to_blk_status(&result, result);
   946		hdr->host_status = host_byte(result);
   947	
   948		return sts;
   949	}
   950	EXPORT_SYMBOL(sg_io_to_blk_status);
   951	

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

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