Hi Perry,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.10-rc2]
[cannot apply to next-20201103]
[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/Perry-Yuan/platform-x86-dell-privacy-Add-support-for-new-privacy-driver/20201103-205721
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
b7cbaf59f62f8ab8f157698f9e31642bff525bd0
config: i386-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # 
https://github.com/0day-ci/linux/commit/cee9f60d7ca58d8f0c6b113c5f7af2dec7e2e27d
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review 
Perry-Yuan/platform-x86-dell-privacy-Add-support-for-new-privacy-driver/20201103-205721
        git checkout cee9f60d7ca58d8f0c6b113c5f7af2dec7e2e27d
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>

All warnings (new ones prefixed by >>):

   drivers/platform/x86/dell-laptop.c: In function 'dell_init':
>> drivers/platform/x86/dell-laptop.c:2212:46: warning: comparison of constant 
>> '-19' with boolean expression is always false [-Wbool-compare]
    2212 |         privacy_valid = dell_privacy_valid() == -ENODEV;
         |                                              ^~
   drivers/platform/x86/dell-laptop.c: In function 'dell_exit':
   drivers/platform/x86/dell-laptop.c:2289:5: warning: this 'if' clause does 
not guard... [-Wmisleading-indentation]
    2289 |     if (!privacy_valid)
         |     ^~
   drivers/platform/x86/dell-laptop.c:2291:2: note: ...this statement, but the 
latter is misleadingly indented as if it were guarded by the 'if'
    2291 |  dell_cleanup_rfkill();
         |  ^~~~~~~~~~~~~~~~~~~
--
   drivers/platform/x86/dell-privacy-wmi.c: In function 'init_dell_privacy':
   drivers/platform/x86/dell-privacy-wmi.c:225:9: warning: unused variable 
'ret' [-Wunused-variable]
     225 |     int ret, wmi, acpi;
         |         ^~~
   drivers/platform/x86/dell-privacy-wmi.c: At top level:
>> drivers/platform/x86/dell-privacy-wmi.c:242:6: warning: no previous 
>> prototype for 'exit_dell_privacy_wmi' [-Wmissing-prototypes]
     242 | void exit_dell_privacy_wmi(void)
         |      ^~~~~~~~~~~~~~~~~~~~~

vim +2212 drivers/platform/x86/dell-laptop.c

  2165  
  2166  static int __init dell_init(void)
  2167  {
  2168          struct calling_interface_token *token;
  2169          int max_intensity = 0;
  2170          int ret;
  2171  
  2172          if (!dmi_check_system(dell_device_table))
  2173                  return -ENODEV;
  2174  
  2175          quirks = NULL;
  2176          /* find if this machine support other functions */
  2177          dmi_check_system(dell_quirks);
  2178  
  2179          ret = platform_driver_register(&platform_driver);
  2180          if (ret)
  2181                  goto fail_platform_driver;
  2182          platform_device = platform_device_alloc("dell-laptop", -1);
  2183          if (!platform_device) {
  2184                  ret = -ENOMEM;
  2185                  goto fail_platform_device1;
  2186          }
  2187          ret = platform_device_add(platform_device);
  2188          if (ret)
  2189                  goto fail_platform_device2;
  2190  
  2191          ret = dell_setup_rfkill();
  2192  
  2193          if (ret) {
  2194                  pr_warn("Unable to setup rfkill\n");
  2195                  goto fail_rfkill;
  2196          }
  2197  
  2198          if (quirks && quirks->touchpad_led)
  2199                  touchpad_led_init(&platform_device->dev);
  2200  
  2201          kbd_led_init(&platform_device->dev);
  2202  
  2203          dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
  2204          debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
  2205                              &dell_debugfs_fops);
  2206  
  2207      dell_laptop_register_notifier(&dell_laptop_notifier);
  2208  
  2209      if (dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE) &&
  2210              dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE)) {
  2211  #if IS_ENABLED(CONFIG_DELL_PRIVACY)
> 2212          privacy_valid = dell_privacy_valid() == -ENODEV;
  2213  #endif
  2214          if (!privacy_valid) {
  2215              micmute_led_cdev.brightness = 
ledtrig_audio_get(LED_AUDIO_MICMUTE);
  2216              ret = led_classdev_register(&platform_device->dev, 
&micmute_led_cdev);
  2217              if (ret < 0)
  2218                  goto fail_led;
  2219          }
  2220      }
  2221  
  2222      if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
  2223          return 0;
  2224  
  2225      token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
  2226          if (token) {
  2227                  struct calling_interface_buffer buffer;
  2228  
  2229                  dell_fill_request(&buffer, token->location, 0, 0, 0);
  2230                  ret = dell_send_request(&buffer,
  2231                                          CLASS_TOKEN_READ, 
SELECT_TOKEN_AC);
  2232                  if (ret == 0)
  2233                          max_intensity = buffer.output[3];
  2234          }
  2235  
  2236          if (max_intensity) {
  2237                  struct backlight_properties props;
  2238                  memset(&props, 0, sizeof(struct backlight_properties));
  2239                  props.type = BACKLIGHT_PLATFORM;
  2240                  props.max_brightness = max_intensity;
  2241                  dell_backlight_device = 
backlight_device_register("dell_backlight",
  2242                                                                    
&platform_device->dev,
  2243                                                                    NULL,
  2244                                                                    
&dell_ops,
  2245                                                                    
&props);
  2246  
  2247                  if (IS_ERR(dell_backlight_device)) {
  2248                          ret = PTR_ERR(dell_backlight_device);
  2249                          dell_backlight_device = NULL;
  2250                          goto fail_backlight;
  2251                  }
  2252  
  2253                  dell_backlight_device->props.brightness =
  2254                          dell_get_intensity(dell_backlight_device);
  2255                  if (dell_backlight_device->props.brightness < 0) {
  2256                          ret = dell_backlight_device->props.brightness;
  2257                          goto fail_get_brightness;
  2258                  }
  2259                  backlight_update_status(dell_backlight_device);
  2260          }
  2261  
  2262          return 0;
  2263  
  2264  fail_get_brightness:
  2265          backlight_device_unregister(dell_backlight_device);
  2266  fail_backlight:
  2267      if (!privacy_valid)
  2268          led_classdev_unregister(&micmute_led_cdev);
  2269  fail_led:
  2270          dell_cleanup_rfkill();
  2271  fail_rfkill:
  2272          platform_device_del(platform_device);
  2273  fail_platform_device2:
  2274          platform_device_put(platform_device);
  2275  fail_platform_device1:
  2276          platform_driver_unregister(&platform_driver);
  2277  fail_platform_driver:
  2278          return ret;
  2279  }
  2280  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

Attachment: .config.gz
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