linux-kernel - [jsarha:topic/cros-sof-v4.14-rebase 199/9999] drivers/idle/intel_idle.c:1000:72: sparse: sparse: incompatible types in conditional expression (different base types):

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Date:   Sun, 24 Jul 2022 12:38:20 +0800
From:   kernel test robot <lkp@...el.com>
To:     Rajneesh Bhardwaj <rajneesh.bhardwaj@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Furquan Shaikh <furquan@...omium.org>
Subject: [jsarha:topic/cros-sof-v4.14-rebase 199/9999]
 drivers/idle/intel_idle.c:1000:72: sparse: sparse: incompatible types in
 conditional expression (different base types):

tree:   https://github.com/jsarha/linux topic/cros-sof-v4.14-rebase
head:   18a233f3f676a98dde00947535d99ab1a54da340
commit: 984b012fc9b1fc849276848135307edabd0d5a58 [199/9999] CHROMIUM: intel_idle: dump debug info when S0ix fails
config: i386-randconfig-s003 (https://download.01.org/0day-ci/archive/20220724/202207241232.utAadQDp-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/jsarha/linux/commit/984b012fc9b1fc849276848135307edabd0d5a58
        git remote add jsarha https://github.com/jsarha/linux
        git fetch --no-tags jsarha topic/cros-sof-v4.14-rebase
        git checkout 984b012fc9b1fc849276848135307edabd0d5a58
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/idle/

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

sparse warnings: (new ones prefixed by >>)
>> drivers/idle/intel_idle.c:1000:72: sparse: sparse: incompatible types in conditional expression (different base types):
>> drivers/idle/intel_idle.c:1000:72: sparse:    int
>> drivers/idle/intel_idle.c:1000:72: sparse:    void

vim +1000 drivers/idle/intel_idle.c

   988	
   989	static int check_slp_s0(u64 slp_s0_saved_count)
   990	{
   991		u64 slp_s0_new_count;
   992	
   993		if (get_slpS0_count(&slp_s0_new_count)) {
   994			pr_warn("After s2idle attempt: Unable to read SLP S0 residency counter\n");
   995			return -EIO;
   996		}
   997	
   998		if (slp_s0_saved_count == slp_s0_new_count) {
   999			WARN(1, "CPU did not enter SLP S0 for suspend-to-idle.\n");
> 1000			boot_cpu_data.x86_model == INTEL_FAM6_ATOM_GEMINI_LAKE ?
  1001					telem_soc_states_display() : pmc_core_ppfear_display();
  1002			return -EIO;
  1003		}
  1004	
  1005		return 0;
  1006	}
  1007	

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