[jsarha:set_multi_pipeline_state_debug 1/1] sound/soc/sof/ipc4-pcm.c:66:10: warning: use of unary operator that may be intended as compound assignment (+=)

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

tree:   https://github.com/jsarha/linux set_multi_pipeline_state_debug
head:   70b57c25bce492b37b15b2c8242f3af34b9fda2c
commit: 70b57c25bce492b37b15b2c8242f3af34b9fda2c [1/1] ASoC: SOF: ipc4-pcm: Pipe instances to dev_dbg in multi_pipeline_state()
config: x86_64-allmodconfig (https://download.01.org/0day-ci/archive/20250320/202503200412.DFJ8fDi2-lkp@intel.com/config)
compiler: clang version 20.1.0 (https://github.com/llvm/llvm-project 24a30daaa559829ad079f2ff7f73eb4e18095f88)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250320/202503200412.DFJ8fDi2-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/202503200412.DFJ8fDi2-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> sound/soc/sof/ipc4-pcm.c:66:10: warning: use of unary operator that may be intended as compound assignment (+=)
      66 |                 offset =+ snprintf(buf + offset, size - offset, " %d",
         |                        ^~
   1 warning generated.


vim +66 sound/soc/sof/ipc4-pcm.c

    58	
    59	static
    60	char *sof_ipc4_set_multi_pipeline_state_debug(struct snd_sof_dev *sdev, char *buf, size_t size,
    61						      struct ipc4_pipeline_set_state_data *trigger_list)
    62	{
    63		int i, offset = 0;
    64	
    65		for (i = 0; i < trigger_list->count; i++) {
  > 66			offset =+ snprintf(buf + offset, size - offset, " %d",
    67					   trigger_list->pipeline_instance_ids[i]);
    68	
    69			if (offset >= size - 1) {
    70				buf[size - 1] = '\0';
    71				break;
    72			}
    73		}
    74		return buf;
    75	}
    76	

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