linux-kernel - [krzk-mem-ctrl:for-v5.17/renesas-rpc 5/5] drivers/memory/renesas-rpc-if.c:253:14: warning: cast to smaller integer type 'enum rpcif

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Date:   Wed, 17 Nov 2021 11:56:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Biju Das <biju.das.jz@...renesas.com>,
        Wolfram Sang <wsa-dev@...g-engineering.com>
Subject: [krzk-mem-ctrl:for-v5.17/renesas-rpc 5/5]
 drivers/memory/renesas-rpc-if.c:253:14: warning: cast to smaller integer
 type 'enum rpcif_type' from 'const void *'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-mem-ctrl.git for-v5.17/renesas-rpc
head:   b04cc0d912eb80d3c438b11d96ca847c3e77e8ab
commit: b04cc0d912eb80d3c438b11d96ca847c3e77e8ab [5/5] memory: renesas-rpc-if: Add support for RZ/G2L
config: x86_64-buildonly-randconfig-r002-20211116 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 4c2cf3a314d9131b1b288e7c8ab0c75ac1b2be1d)
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://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-mem-ctrl.git/commit/?id=b04cc0d912eb80d3c438b11d96ca847c3e77e8ab
        git remote add krzk-mem-ctrl https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-mem-ctrl.git
        git fetch --no-tags krzk-mem-ctrl for-v5.17/renesas-rpc
        git checkout b04cc0d912eb80d3c438b11d96ca847c3e77e8ab
        # 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 warnings (new ones prefixed by >>):

>> drivers/memory/renesas-rpc-if.c:253:14: warning: cast to smaller integer type 'enum rpcif_type' from 'const void *' [-Wvoid-pointer-to-enum-cast]
           rpc->type = (enum rpcif_type)of_device_get_match_data(dev);
                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +253 drivers/memory/renesas-rpc-if.c

   226	
   227	int rpcif_sw_init(struct rpcif *rpc, struct device *dev)
   228	{
   229		struct platform_device *pdev = to_platform_device(dev);
   230		struct resource *res;
   231	
   232		rpc->dev = dev;
   233	
   234		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
   235		rpc->base = devm_ioremap_resource(&pdev->dev, res);
   236		if (IS_ERR(rpc->base))
   237			return PTR_ERR(rpc->base);
   238	
   239		rpc->regmap = devm_regmap_init(&pdev->dev, NULL, rpc, &rpcif_regmap_config);
   240		if (IS_ERR(rpc->regmap)) {
   241			dev_err(&pdev->dev,
   242				"failed to init regmap for rpcif, error %ld\n",
   243				PTR_ERR(rpc->regmap));
   244			return	PTR_ERR(rpc->regmap);
   245		}
   246	
   247		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dirmap");
   248		rpc->dirmap = devm_ioremap_resource(&pdev->dev, res);
   249		if (IS_ERR(rpc->dirmap))
   250			return PTR_ERR(rpc->dirmap);
   251		rpc->size = resource_size(res);
   252	
 > 253		rpc->type = (enum rpcif_type)of_device_get_match_data(dev);
   254		rpc->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
   255	
   256		return PTR_ERR_OR_ZERO(rpc->rstc);
   257	}
   258	EXPORT_SYMBOL(rpcif_sw_init);
   259	

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

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