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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/ChunAn-Wu/platform-x86-dell-uart-backlight-Bind-through-normal-serdev-matching/20261024-102929 base: driver-core/driver-core-testing patch link: https://lore.kernel.org/r/20261024022930.2704030-3-an.wu%40canonical.com patch subject: [PATCH v4] platform/x86: dell-uart-backlight: Bind through normal serdev matching config: i386-randconfig-1007-20261024 (https://download.01.org/0day-ci/archive/20261024/202610241920.GJiRENj2-lkp@intel.com/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261024/202610241920.GJiRENj2-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202610241920.GJiRENj2-lkp@intel.com/ All error/warnings (new ones prefixed by >>): >> drivers/platform/x86/dell/dell-uart-backlight.c:328:38: error: array type has incomplete element type 'struct serdev_device_id' 328 | static const struct serdev_device_id dell_uart_bl_serdev_id[] = { | ^~~~~~~~~~~~~~~~~~~~~~ >> drivers/platform/x86/dell/dell-uart-backlight.c:338:10: error: 'struct serdev_device_driver' has no member named 'id_table' 338 | .id_table = dell_uart_bl_serdev_id, | ^~~~~~~~ drivers/platform/x86/dell/dell-uart-backlight.c: In function 'dell_uart_bl_pdev_probe': >> drivers/platform/x86/dell/dell-uart-backlight.c:363:15: error: too many arguments to function 'serdev_device_add' 363 | ret = serdev_device_add(serdev, KBUILD_MODNAME); | ^~~~~~~~~~~~~~~~~ In file included from drivers/platform/x86/dell/dell-uart-backlight.c:19: include/linux/serdev.h:161:5: note: declared here 161 | int serdev_device_add(struct serdev_device *); | ^~~~~~~~~~~~~~~~~ drivers/platform/x86/dell/dell-uart-backlight.c: At top level: >> drivers/platform/x86/dell/dell-uart-backlight.c:328:38: warning: 'dell_uart_bl_serdev_id' defined but not used [-Wunused-variable] 328 | static const struct serdev_device_id dell_uart_bl_serdev_id[] = { | ^~~~~~~~~~~~~~~~~~~~~~ vim +328 drivers/platform/x86/dell/dell-uart-backlight.c 327 > 328 static const struct serdev_device_id dell_uart_bl_serdev_id[] = { 329 { KBUILD_MODNAME }, 330 { } 331 }; 332 333 static struct serdev_device_driver dell_uart_bl_serdev_driver = { 334 .probe = dell_uart_bl_serdev_probe, 335 .driver = { 336 .name = KBUILD_MODNAME, 337 }, > 338 .id_table = dell_uart_bl_serdev_id, 339 }; 340 341 static int dell_uart_bl_pdev_probe(struct platform_device *pdev) 342 { 343 enum acpi_backlight_type bl_type; 344 struct serdev_device *serdev; 345 struct device *ctrl_dev; 346 int ret; 347 348 bl_type = acpi_video_get_backlight_type(); 349 if (bl_type != acpi_backlight_dell_uart) { 350 dev_dbg(&pdev->dev, "Not loading (ACPI backlight type = %d)\n", bl_type); 351 return -ENODEV; 352 } 353 354 ctrl_dev = get_serdev_controller("DELL0501", NULL, 0, "serial0"); 355 if (IS_ERR(ctrl_dev)) 356 return PTR_ERR(ctrl_dev); 357 358 serdev = serdev_device_alloc(to_serdev_controller(ctrl_dev)); 359 put_device(ctrl_dev); 360 if (!serdev) 361 return -ENOMEM; 362 > 363 ret = serdev_device_add(serdev, KBUILD_MODNAME); 364 if (ret) { 365 dev_err(&pdev->dev, "error %d adding serdev\n", ret); 366 serdev_device_put(serdev); 367 return ret; 368 } 369 370 ret = serdev_device_driver_register(&dell_uart_bl_serdev_driver); 371 if (ret) 372 goto err_remove_serdev; 373 374 /* So that dell_uart_bl_pdev_remove() can remove the serdev */ 375 platform_set_drvdata(pdev, serdev); 376 return 0; 377 378 err_remove_serdev: 379 serdev_device_remove(serdev); 380 return ret; 381 } 382 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki