linux-kernel - sound/soc/fsl/imx-audmux.c:301:16: warning: cast to smaller integer type 'enum imx_audmux

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Date:   Wed, 17 Nov 2021 06:48:18 +0800
From:   kernel test robot <lkp@...el.com>
To:     Fabio Estevam <festevam@...il.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: sound/soc/fsl/imx-audmux.c:301:16: warning: cast to smaller integer
 type 'enum imx_audmux_type' from 'const void *'

Hi Fabio,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8ab774587903771821b59471cc723bba6d893942
commit: 6a8b8b582db13a18235f3b0400f103a0573c7859 ASoC: imx-audmux: Remove unused .id_table
date:   12 months ago
config: arm64-buildonly-randconfig-r003-20211116 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project fbe72e41b99dc7994daac300d208a955be3e4a0a)
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
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6a8b8b582db13a18235f3b0400f103a0573c7859
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 6a8b8b582db13a18235f3b0400f103a0573c7859
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> sound/soc/fsl/imx-audmux.c:301:16: warning: cast to smaller integer type 'enum imx_audmux_type' from 'const void *' [-Wvoid-pointer-to-enum-cast]
           audmux_type = (enum imx_audmux_type)of_device_get_match_data(&pdev->dev);
                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +301 sound/soc/fsl/imx-audmux.c

   287	
   288	static int imx_audmux_probe(struct platform_device *pdev)
   289	{
   290		audmux_base = devm_platform_ioremap_resource(pdev, 0);
   291		if (IS_ERR(audmux_base))
   292			return PTR_ERR(audmux_base);
   293	
   294		audmux_clk = devm_clk_get(&pdev->dev, "audmux");
   295		if (IS_ERR(audmux_clk)) {
   296			dev_dbg(&pdev->dev, "cannot get clock: %ld\n",
   297					PTR_ERR(audmux_clk));
   298			audmux_clk = NULL;
   299		}
   300	
 > 301		audmux_type = (enum imx_audmux_type)of_device_get_match_data(&pdev->dev);
   302	
   303		switch (audmux_type) {
   304		case IMX31_AUDMUX:
   305			audmux_debugfs_init();
   306			reg_max = 14;
   307			break;
   308		case IMX21_AUDMUX:
   309			reg_max = 6;
   310			break;
   311		default:
   312			dev_err(&pdev->dev, "unsupported version!\n");
   313			return -EINVAL;
   314		}
   315	
   316		regcache = devm_kzalloc(&pdev->dev, sizeof(u32) * reg_max, GFP_KERNEL);
   317		if (!regcache)
   318			return -ENOMEM;
   319	
   320		imx_audmux_parse_dt_defaults(pdev, pdev->dev.of_node);
   321	
   322		return 0;
   323	}
   324	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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