linux-kernel - drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c:415:10: warning: cast to smaller integer type 'enum mtk_ovl_adaptor_comp

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <202307100103.5TXiJnCm-lkp@intel.com>
Date:   Mon, 10 Jul 2023 01:44:43 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Nancy.Lin" <nancy.lin@...iatek.com>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c:415:10: warning:
 cast to smaller integer type 'enum mtk_ovl_adaptor_comp_type' from 'const
 void *'

Hi Nancy.Lin,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1c7873e3364570ec89343ff4877e0f27a7b21a61
commit: 453c3364632a1f305db7d425dc9f8d6711cd3491 drm/mediatek: Add ovl_adaptor support for MT8195
date:   4 months ago
config: arm64-randconfig-r021-20230709 (https://download.01.org/0day-ci/archive/20230710/202307100103.5TXiJnCm-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230710/202307100103.5TXiJnCm-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 <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307100103.5TXiJnCm-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c:415:10: warning: cast to smaller integer type 'enum mtk_ovl_adaptor_comp_type' from 'const void *' [-Wvoid-pointer-to-enum-cast]
     415 |                 type = (enum mtk_ovl_adaptor_comp_type)of_id->data;
         |                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +415 drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c

   391	
   392	static int ovl_adaptor_comp_init(struct device *dev, struct component_match **match)
   393	{
   394		struct mtk_disp_ovl_adaptor *priv = dev_get_drvdata(dev);
   395		struct device_node *node, *parent;
   396		struct platform_device *comp_pdev;
   397	
   398		parent = dev->parent->parent->of_node->parent;
   399	
   400		for_each_child_of_node(parent, node) {
   401			const struct of_device_id *of_id;
   402			enum mtk_ovl_adaptor_comp_type type;
   403			int id;
   404	
   405			of_id = of_match_node(mtk_ovl_adaptor_comp_dt_ids, node);
   406			if (!of_id)
   407				continue;
   408	
   409			if (!of_device_is_available(node)) {
   410				dev_dbg(dev, "Skipping disabled component %pOF\n",
   411					node);
   412				continue;
   413			}
   414	
 > 415			type = (enum mtk_ovl_adaptor_comp_type)of_id->data;
   416			id = ovl_adaptor_comp_get_id(dev, node, type);
   417			if (id < 0) {
   418				dev_warn(dev, "Skipping unknown component %pOF\n",
   419					 node);
   420				continue;
   421			}
   422	
   423			comp_pdev = of_find_device_by_node(node);
   424			if (!comp_pdev)
   425				return -EPROBE_DEFER;
   426	
   427			priv->ovl_adaptor_comp[id] = &comp_pdev->dev;
   428	
   429			drm_of_component_match_add(dev, match, compare_of, node);
   430			dev_dbg(dev, "Adding component match for %pOF\n", node);
   431		}
   432	
   433		if (!*match) {
   434			dev_err(dev, "No match device for ovl_adaptor\n");
   435			return -ENODEV;
   436		}
   437	
   438		return 0;
   439	}
   440	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki