Re: [PATCH] soc: qcom: qmi: use const for struct qmi_elem_info

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Hi Jeff,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.0-rc2 next-20220822]
[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/Jeff-Johnson/soc-qcom-qmi-use-const-for-struct-qmi_elem_info/20220822-144905
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 1c23f9e627a7b412978b4e852793c5e3c3efc555
config: nios2-randconfig-s051-20220821 (https://download.01.org/0day-ci/archive/20220822/202208222141.fcwTIcFt-lkp@xxxxxxxxx/config)
compiler: nios2-linux-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/intel-lab-lkp/linux/commit/84f0de3071b40fad5e5a48ad27b16ce28f9210fb
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jeff-Johnson/soc-qcom-qmi-use-const-for-struct-qmi_elem_info/20220822-144905
        git checkout 84f0de3071b40fad5e5a48ad27b16ce28f9210fb
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=nios2 SHELL=/bin/bash drivers/soc/qcom/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

sparse warnings: (new ones prefixed by >>)
>> drivers/soc/qcom/qmi_encdec.c:94:16: sparse: sparse: incorrect type in return expression (different modifiers) @@     expected struct qmi_elem_info * @@     got struct qmi_elem_info const *[assigned] temp_ei @@
   drivers/soc/qcom/qmi_encdec.c:94:16: sparse:     expected struct qmi_elem_info *
   drivers/soc/qcom/qmi_encdec.c:94:16: sparse:     got struct qmi_elem_info const *[assigned] temp_ei

vim +94 drivers/soc/qcom/qmi_encdec.c

9b8a11e8261527 Bjorn Andersson 2017-12-05  59  
84f0de3071b40f Jeff Johnson    2022-08-21  60  static int qmi_encode(const struct qmi_elem_info *ei_array, void *out_buf,
9b8a11e8261527 Bjorn Andersson 2017-12-05  61  		      const void *in_c_struct, u32 out_buf_len,
9b8a11e8261527 Bjorn Andersson 2017-12-05  62  		      int enc_level);
9b8a11e8261527 Bjorn Andersson 2017-12-05  63  
84f0de3071b40f Jeff Johnson    2022-08-21  64  static int qmi_decode(const struct qmi_elem_info *ei_array, void *out_c_struct,
9b8a11e8261527 Bjorn Andersson 2017-12-05  65  		      const void *in_buf, u32 in_buf_len, int dec_level);
9b8a11e8261527 Bjorn Andersson 2017-12-05  66  
9b8a11e8261527 Bjorn Andersson 2017-12-05  67  /**
9b8a11e8261527 Bjorn Andersson 2017-12-05  68   * skip_to_next_elem() - Skip to next element in the structure to be encoded
9b8a11e8261527 Bjorn Andersson 2017-12-05  69   * @ei_array: Struct info describing the element to be skipped.
9b8a11e8261527 Bjorn Andersson 2017-12-05  70   * @level: Depth level of encoding/decoding to identify nested structures.
9b8a11e8261527 Bjorn Andersson 2017-12-05  71   *
9b8a11e8261527 Bjorn Andersson 2017-12-05  72   * This function is used while encoding optional elements. If the flag
9b8a11e8261527 Bjorn Andersson 2017-12-05  73   * corresponding to an optional element is not set, then encoding the
9b8a11e8261527 Bjorn Andersson 2017-12-05  74   * optional element can be skipped. This function can be used to perform
9b8a11e8261527 Bjorn Andersson 2017-12-05  75   * that operation.
9b8a11e8261527 Bjorn Andersson 2017-12-05  76   *
9b8a11e8261527 Bjorn Andersson 2017-12-05  77   * Return: struct info of the next element that can be encoded.
9b8a11e8261527 Bjorn Andersson 2017-12-05  78   */
84f0de3071b40f Jeff Johnson    2022-08-21  79  static struct qmi_elem_info *skip_to_next_elem(const struct qmi_elem_info *ei_array,
9b8a11e8261527 Bjorn Andersson 2017-12-05  80  					       int level)
9b8a11e8261527 Bjorn Andersson 2017-12-05  81  {
84f0de3071b40f Jeff Johnson    2022-08-21  82  	const struct qmi_elem_info *temp_ei = ei_array;
9b8a11e8261527 Bjorn Andersson 2017-12-05  83  	u8 tlv_type;
9b8a11e8261527 Bjorn Andersson 2017-12-05  84  
9b8a11e8261527 Bjorn Andersson 2017-12-05  85  	if (level > 1) {
9b8a11e8261527 Bjorn Andersson 2017-12-05  86  		temp_ei = temp_ei + 1;
9b8a11e8261527 Bjorn Andersson 2017-12-05  87  	} else {
9b8a11e8261527 Bjorn Andersson 2017-12-05  88  		do {
9b8a11e8261527 Bjorn Andersson 2017-12-05  89  			tlv_type = temp_ei->tlv_type;
9b8a11e8261527 Bjorn Andersson 2017-12-05  90  			temp_ei = temp_ei + 1;
9b8a11e8261527 Bjorn Andersson 2017-12-05  91  		} while (tlv_type == temp_ei->tlv_type);
9b8a11e8261527 Bjorn Andersson 2017-12-05  92  	}
9b8a11e8261527 Bjorn Andersson 2017-12-05  93  
9b8a11e8261527 Bjorn Andersson 2017-12-05 @94  	return temp_ei;
9b8a11e8261527 Bjorn Andersson 2017-12-05  95  }
9b8a11e8261527 Bjorn Andersson 2017-12-05  96  

-- 
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https://01.org/lkp



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