Hi Dmitry, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on next-20220506] [also build test WARNING on v5.18-rc5] [cannot apply to drm/drm-next v5.18-rc5 v5.18-rc4 v5.18-rc3] [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/intel-lab-lkp/linux/commits/Dmitry-Baryshkov/drm-msm-mdp4-convert-to-drm_crtc_handle_vblank/20220507-090522 base: 38a288f5941ef03752887ad86f2d85442358c99a config: hexagon-allyesconfig (https://download.01.org/0day-ci/archive/20220507/202205072052.67OjKtjD-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project af4cf1c6b8ed0d8102fc5e69acdc2fcbbcdaa9a7) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/08ab9442139f4b4c9e33ce35986014219fd1d5d0 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Dmitry-Baryshkov/drm-msm-mdp4-convert-to-drm_crtc_handle_vblank/20220507-090522 git checkout 08ab9442139f4b4c9e33ce35986014219fd1d5d0 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/gpu/drm/msm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/gpu/drm/msm/msm_drv.c:428:22: warning: variable 'i' is uninitialized when used here [-Wuninitialized] priv->event_thread[i].crtc = crtc; ^ drivers/gpu/drm/msm/msm_drv.c:353:12: note: initialize the variable 'i' to silence this warning int ret, i; ^ = 0 1 warning generated. vim +/i +428 drivers/gpu/drm/msm/msm_drv.c 346 347 static int msm_drm_init(struct device *dev, const struct drm_driver *drv) 348 { 349 struct msm_drm_private *priv = dev_get_drvdata(dev); 350 struct drm_device *ddev; 351 struct msm_kms *kms; 352 struct drm_crtc *crtc; 353 int ret, i; 354 355 if (drm_firmware_drivers_only()) 356 return -ENODEV; 357 358 ddev = drm_dev_alloc(drv, dev); 359 if (IS_ERR(ddev)) { 360 DRM_DEV_ERROR(dev, "failed to allocate drm_device\n"); 361 return PTR_ERR(ddev); 362 } 363 ddev->dev_private = priv; 364 priv->dev = ddev; 365 366 priv->wq = alloc_ordered_workqueue("msm", 0); 367 priv->hangcheck_period = DRM_MSM_HANGCHECK_DEFAULT_PERIOD; 368 369 INIT_LIST_HEAD(&priv->objects); 370 mutex_init(&priv->obj_lock); 371 372 INIT_LIST_HEAD(&priv->inactive_willneed); 373 INIT_LIST_HEAD(&priv->inactive_dontneed); 374 INIT_LIST_HEAD(&priv->inactive_unpinned); 375 mutex_init(&priv->mm_lock); 376 377 /* Teach lockdep about lock ordering wrt. shrinker: */ 378 fs_reclaim_acquire(GFP_KERNEL); 379 might_lock(&priv->mm_lock); 380 fs_reclaim_release(GFP_KERNEL); 381 382 drm_mode_config_init(ddev); 383 384 ret = msm_init_vram(ddev); 385 if (ret) 386 return ret; 387 388 /* Bind all our sub-components: */ 389 ret = component_bind_all(dev, ddev); 390 if (ret) 391 return ret; 392 393 dma_set_max_seg_size(dev, UINT_MAX); 394 395 msm_gem_shrinker_init(ddev); 396 397 if (priv->kms_init) { 398 ret = priv->kms_init(ddev); 399 if (ret) { 400 DRM_DEV_ERROR(dev, "failed to load kms\n"); 401 priv->kms = NULL; 402 goto err_msm_uninit; 403 } 404 kms = priv->kms; 405 } else { 406 /* valid only for the dummy headless case, where of_node=NULL */ 407 WARN_ON(dev->of_node); 408 kms = NULL; 409 } 410 411 /* Enable normalization of plane zpos */ 412 ddev->mode_config.normalize_zpos = true; 413 414 if (kms) { 415 kms->dev = ddev; 416 ret = kms->funcs->hw_init(kms); 417 if (ret) { 418 DRM_DEV_ERROR(dev, "kms hw init failed: %d\n", ret); 419 goto err_msm_uninit; 420 } 421 } 422 423 ddev->mode_config.funcs = &mode_config_funcs; 424 ddev->mode_config.helper_private = &mode_config_helper_funcs; 425 426 drm_for_each_crtc(crtc, ddev) { 427 /* initialize event thread */ > 428 priv->event_thread[i].crtc = crtc; 429 priv->event_thread[i].dev = ddev; 430 priv->event_thread[i].worker = kthread_create_worker(0, 431 "crtc_event:%d", priv->event_thread[i].crtc->base.id); 432 if (IS_ERR(priv->event_thread[i].worker)) { 433 ret = PTR_ERR(priv->event_thread[i].worker); 434 DRM_DEV_ERROR(dev, "failed to create crtc_event kthread\n"); 435 ret = PTR_ERR(priv->event_thread[i].worker); 436 goto err_msm_uninit; 437 } 438 439 sched_set_fifo(priv->event_thread[i].worker->task); 440 } 441 442 ret = drm_vblank_init(ddev, priv->num_crtcs); 443 if (ret < 0) { 444 DRM_DEV_ERROR(dev, "failed to initialize vblank\n"); 445 goto err_msm_uninit; 446 } 447 448 if (kms) { 449 pm_runtime_get_sync(dev); 450 ret = msm_irq_install(ddev, kms->irq); 451 pm_runtime_put_sync(dev); 452 if (ret < 0) { 453 DRM_DEV_ERROR(dev, "failed to install IRQ handler\n"); 454 goto err_msm_uninit; 455 } 456 } 457 458 ret = drm_dev_register(ddev, 0); 459 if (ret) 460 goto err_msm_uninit; 461 462 if (kms) { 463 ret = msm_disp_snapshot_init(ddev); 464 if (ret) 465 DRM_DEV_ERROR(dev, "msm_disp_snapshot_init failed ret = %d\n", ret); 466 } 467 drm_mode_config_reset(ddev); 468 -- 0-DAY CI Kernel Test Service https://01.org/lkp
