Re: [PATCH 2/2] soundwire: bus: Update sdw_nread/nwrite_no_pm to handle page boundaries

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

Hi Charles,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.3-rc2 next-20230316]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Charles-Keepax/soundwire-bus-Update-sdw_nread-nwrite_no_pm-to-handle-page-boundaries/20230317-000005
patch link:    https://lore.kernel.org/r/20230316155734.3191577-2-ckeepax%40opensource.cirrus.com
patch subject: [PATCH 2/2] soundwire: bus: Update sdw_nread/nwrite_no_pm to handle page boundaries
config: mips-randconfig-r022-20230312 (https://download.01.org/0day-ci/archive/20230317/202303170724.NdbQwtQo-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
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 mips cross compiling tool for clang build
        # apt-get install binutils-mipsel-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/6944d7175bd15a9a16a411c57f200d3bcecd3c00
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Charles-Keepax/soundwire-bus-Update-sdw_nread-nwrite_no_pm-to-handle-page-boundaries/20230317-000005
        git checkout 6944d7175bd15a9a16a411c57f200d3bcecd3c00
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/soundwire/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303170724.NdbQwtQo-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/soundwire/bus.c:398:10: warning: comparison of distinct pointer types ('typeof (count) *' (aka 'unsigned int *') and 'typeof ((((((int)(sizeof(struct (unnamed struct at drivers/soundwire/bus.c:398:10))))) + (((~(((0UL)))) - ((((1UL))) << (0)) + 1) & (~(((0UL))) >> (32 - 1 - (14))))) + 1) - (addr & ((((int)(sizeof(struct (unnamed struct at drivers/soundwire/bus.c:398:10))))) + (((~(((0UL)))) - ((((1UL))) << (0)) + 1) & (~(((0UL))) >> (32 - 1 - (14))))))) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
                   size = min(count, (SDW_REGADDR + 1) - (addr & SDW_REGADDR));
                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:67:19: note: expanded from macro 'min'
   #define min(x, y)       __careful_cmp(x, y, <)
                           ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
           __builtin_choose_expr(__safe_cmp(x, y), \
                                 ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
                   (__typecheck(x, y) && __no_side_effects(x, y))
                    ^~~~~~~~~~~~~~~~~
   include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
           (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
                      ~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~
   1 warning generated.


vim +398 drivers/soundwire/bus.c

   384	
   385	/*
   386	 * Read/Write IO functions.
   387	 */
   388	
   389	static int sdw_ntransfer_no_pm(struct sdw_slave *slave, u32 addr, u8 flags,
   390				       size_t count, u8 *val)
   391	{
   392		struct sdw_msg msg;
   393		size_t size;
   394		int ret;
   395	
   396		while (count) {
   397			// Only handle bytes up to next page boundary
 > 398			size = min(count, (SDW_REGADDR + 1) - (addr & SDW_REGADDR));
   399	
   400			ret = sdw_fill_msg(&msg, slave, addr, size, slave->dev_num, flags, val);
   401			if (ret < 0)
   402				return ret;
   403	
   404			ret = sdw_transfer(slave->bus, &msg);
   405			if (ret < 0 && !slave->is_mockup_device)
   406				return ret;
   407	
   408			addr += size;
   409			val += size;
   410			count -= size;
   411		}
   412	
   413		return 0;
   414	}
   415	

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