Hi Thomas, kernel test robot noticed the following build warnings:
[auto build test WARNING on drm-exynos/exynos-drm-next] [also build test WARNING on drm-i915/for-linux-next drm-i915/for-linux-next-fixes tegra/for-next linus/master v6.18-rc2 next-20251024] [cannot apply to rmk-arm/drm-armada-devel rmk-arm/drm-armada-fixes] [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/Thomas-Zimmermann/drm-fb-helper-Allocate-and-release-fb_info-in-single-place/20251027-014054 base: https://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git exynos-drm-next patch link: https://lore.kernel.org/r/20251026173944.219373-1-tzimmermann%40suse.de patch subject: [PATCH] drm/fb-helper: Allocate and release fb_info in single place config: arm-randconfig-002-20251027 (https://download.01.org/0day-ci/archive/20251027/[email protected]/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project e1ae12640102fd2b05bc567243580f90acb1135f) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251027/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/drm_fbdev_ttm.c:208:26: warning: variable 'info' is >> uninitialized when used here [-Wuninitialized] 208 | drm_fb_helper_fill_info(info, fb_helper, sizes); | ^~~~ drivers/gpu/drm/drm_fbdev_ttm.c:180:22: note: initialize the variable 'info' to silence this warning 180 | struct fb_info *info; | ^ | = NULL 1 warning generated. -- >> drivers/gpu/drm/armada/armada_fbdev.c:111:2: warning: unused label >> 'err_fballoc' [-Wunused-label] 111 | err_fballoc: | ^~~~~~~~~~~~ 1 warning generated. -- >> drivers/gpu/drm/radeon/radeon_fbdev.c:275:1: warning: unused label >> 'err_drm_framebuffer_unregister_private' [-Wunused-label] 275 | err_drm_framebuffer_unregister_private: | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. vim +/info +208 drivers/gpu/drm/drm_fbdev_ttm.c 8ab59da26bc0ae drivers/gpu/drm/drm_fbdev_generic.c Thomas Zimmermann 2022-11-03 169 c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 170 /* c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 171 * struct drm_driver c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 172 */ c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 173 c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 174 int drm_fbdev_ttm_driver_fbdev_probe(struct drm_fb_helper *fb_helper, c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 175 struct drm_fb_helper_surface_size *sizes) c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 176 { c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 177 struct drm_client_dev *client = &fb_helper->client; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 178 struct drm_device *dev = fb_helper->dev; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 179 struct drm_client_buffer *buffer; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 180 struct fb_info *info; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 181 size_t screen_size; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 182 void *screen_buffer; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 183 u32 format; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 184 int ret; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 185 c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 186 drm_dbg_kms(dev, "surface width(%d), height(%d) and bpp(%d)\n", c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 187 sizes->surface_width, sizes->surface_height, c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 188 sizes->surface_bpp); c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 189 c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 190 format = drm_driver_legacy_fb_format(dev, sizes->surface_bpp, c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 191 sizes->surface_depth); c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 192 buffer = drm_client_framebuffer_create(client, sizes->surface_width, c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 193 sizes->surface_height, format); c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 194 if (IS_ERR(buffer)) c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 195 return PTR_ERR(buffer); c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 196 c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 197 fb_helper->funcs = &drm_fbdev_ttm_helper_funcs; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 198 fb_helper->buffer = buffer; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 199 fb_helper->fb = buffer->fb; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 200 c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 201 screen_size = buffer->gem->size; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 202 screen_buffer = vzalloc(screen_size); c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 203 if (!screen_buffer) { c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 204 ret = -ENOMEM; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 205 goto err_drm_client_framebuffer_delete; c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 206 } c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 207 c7c1b9e1d52b0a drivers/gpu/drm/drm_fbdev_ttm.c Thomas Zimmermann 2024-09-24 @208 drm_fb_helper_fill_info(info, fb_helper, sizes); 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