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Message-ID: <202110182057.Xse3pZCT-lkp@intel.com>
Date: Mon, 18 Oct 2021 20:14:31 +0800
From: kernel test robot <lkp@...el.com>
To: luo penghao <cgel.zte@...il.com>,
Jani Nikula <jani.nikula@...ux.intel.com>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, luo penghao <luo.penghao@....com.cn>,
Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH linux-next] drm/i915/display: Remove unused variable in
the for loop.
Hi luo,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on next-20211015]
url: https://github.com/0day-ci/linux/commits/luo-penghao/drm-i915-display-Remove-unused-variable-in-the-for-loop/20211018-164557
base: 7c832d2f9b959e3181370c8b0dacaf9efe13fc05
config: x86_64-randconfig-r014-20211018 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d245f2e8597bfb52c34810a328d42b990e4af1a4)
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/0day-ci/linux/commit/1a3c67fc7e245a1130e2b59fe5a04ce82de697c0
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review luo-penghao/drm-i915-display-Remove-unused-variable-in-the-for-loop/20211018-164557
git checkout 1a3c67fc7e245a1130e2b59fe5a04ce82de697c0
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
>> drivers/gpu/drm/i915/display/intel_fb.c:1018:25: error: expression result unused [-Werror,-Wunused-value]
fb->base.format->cpp[i];
~~~~~~~~~~~~~~~~~~~~ ~^
1 error generated.
vim +1018 drivers/gpu/drm/i915/display/intel_fb.c
977
978 int intel_fill_fb_info(struct drm_i915_private *i915, struct intel_framebuffer *fb)
979 {
980 struct drm_i915_gem_object *obj = intel_fb_obj(&fb->base);
981 u32 gtt_offset_rotated = 0;
982 u32 gtt_offset_remapped = 0;
983 unsigned int max_size = 0;
984 int i, num_planes = fb->base.format->num_planes;
985 unsigned int tile_size = intel_tile_size(i915);
986
987 intel_fb_view_init(i915, &fb->normal_view, I915_GGTT_VIEW_NORMAL);
988
989 drm_WARN_ON(&i915->drm,
990 intel_fb_supports_90_270_rotation(fb) &&
991 intel_fb_needs_pot_stride_remap(fb));
992
993 if (intel_fb_supports_90_270_rotation(fb))
994 intel_fb_view_init(i915, &fb->rotated_view, I915_GGTT_VIEW_ROTATED);
995 if (intel_fb_needs_pot_stride_remap(fb))
996 intel_fb_view_init(i915, &fb->remapped_view, I915_GGTT_VIEW_REMAPPED);
997
998 for (i = 0; i < num_planes; i++) {
999 struct fb_plane_view_dims view_dims;
1000 unsigned int width, height;
1001 unsigned int size;
1002 u32 offset;
1003 int x, y;
1004 int ret;
1005
1006 /*
1007 * Plane 2 of Render Compression with Clear Color fb modifier
1008 * is consumed by the driver and not passed to DE. Skip the
1009 * arithmetic related to alignment and offset calculation.
1010 */
1011 if (is_gen12_ccs_cc_plane(&fb->base, i)) {
1012 if (IS_ALIGNED(fb->base.offsets[i], PAGE_SIZE))
1013 continue;
1014 else
1015 return -EINVAL;
1016 }
1017
> 1018 fb->base.format->cpp[i];
1019 intel_fb_plane_dims(fb, i, &width, &height);
1020
1021 ret = convert_plane_offset_to_xy(fb, i, width, &x, &y);
1022 if (ret)
1023 return ret;
1024
1025 init_plane_view_dims(fb, i, width, height, &view_dims);
1026
1027 /*
1028 * First pixel of the framebuffer from
1029 * the start of the normal gtt mapping.
1030 */
1031 fb->normal_view.color_plane[i].x = x;
1032 fb->normal_view.color_plane[i].y = y;
1033 fb->normal_view.color_plane[i].stride = fb->base.pitches[i];
1034
1035 offset = calc_plane_aligned_offset(fb, i, &x, &y);
1036
1037 if (intel_fb_supports_90_270_rotation(fb))
1038 gtt_offset_rotated += calc_plane_remap_info(fb, i, &view_dims,
1039 offset, gtt_offset_rotated, x, y,
1040 &fb->rotated_view);
1041
1042 if (intel_fb_needs_pot_stride_remap(fb))
1043 gtt_offset_remapped += calc_plane_remap_info(fb, i, &view_dims,
1044 offset, gtt_offset_remapped, x, y,
1045 &fb->remapped_view);
1046
1047 size = calc_plane_normal_size(fb, i, &view_dims, x, y);
1048 /* how many tiles in total needed in the bo */
1049 max_size = max(max_size, offset + size);
1050 }
1051
1052 if (mul_u32_u32(max_size, tile_size) > obj->base.size) {
1053 drm_dbg_kms(&i915->drm,
1054 "fb too big for bo (need %llu bytes, have %zu bytes)\n",
1055 mul_u32_u32(max_size, tile_size), obj->base.size);
1056 return -EINVAL;
1057 }
1058
1059 return 0;
1060 }
1061
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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