linux-kernel - [asahilinux:pr/22 96/189] drivers/platform/apple/smc_core.c:202:26: sparse: sparse: cast to restricted _

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Message-ID: <202203280041.0z3zY6Vd-lkp@intel.com>
Date:   Mon, 28 Mar 2022 00:15:21 +0800
From:   kernel test robot <lkp@...el.com>
To:     Hector Martin <marcan@...can.st>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [asahilinux:pr/22 96/189] drivers/platform/apple/smc_core.c:202:26:
 sparse: sparse: cast to restricted __be32

tree:   https://github.com/AsahiLinux/linux pr/22
head:   7ee315306d1a3b0da8cf2a53e7f55889d0e7f034
commit: 322906b25cbf56148e4b57a6368f6d715e48b022 [96/189] platform/apple: Add new Apple Mac SMC driver
config: arm64-randconfig-s032-20220327 (https://download.01.org/0day-ci/archive/20220328/202203280041.0z3zY6Vd-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://github.com/AsahiLinux/linux/commit/322906b25cbf56148e4b57a6368f6d715e48b022
        git remote add asahilinux https://github.com/AsahiLinux/linux
        git fetch --no-tags asahilinux pr/22
        git checkout 322906b25cbf56148e4b57a6368f6d715e48b022
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 SHELL=/bin/bash

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


sparse warnings: (new ones prefixed by >>)
>> drivers/platform/apple/smc_core.c:202:26: sparse: sparse: cast to restricted __be32

vim +202 drivers/platform/apple/smc_core.c

   182	
   183	struct apple_smc *apple_smc_probe(struct device *dev, const struct apple_smc_backend_ops *ops, void *cookie)
   184	{
   185		struct apple_smc *smc;
   186		u32 count;
   187		int ret;
   188	
   189		smc = devm_kzalloc(dev, sizeof(*smc), GFP_KERNEL);
   190		if (!smc)
   191			return ERR_PTR(-ENOMEM);
   192	
   193		smc->dev = dev;
   194		smc->be_cookie = cookie;
   195		smc->be = ops;
   196		mutex_init(&smc->mutex);
   197		RAW_INIT_NOTIFIER_HEAD(&smc->event_handlers);
   198	
   199		ret = apple_smc_read_u32(smc, SMC_KEY(#KEY), &count);
   200		if (ret)
   201			return ERR_PTR(dev_err_probe(dev, ret, "Failed to get key count"));
 > 202		smc->key_count = be32_to_cpu(count);
   203	
   204		ret = apple_smc_get_key_by_index(smc, 0, &smc->first_key);
   205		if (ret)
   206			return ERR_PTR(dev_err_probe(dev, ret, "Failed to get first key"));
   207	
   208		ret = apple_smc_get_key_by_index(smc, smc->key_count - 1, &smc->last_key);
   209		if (ret)
   210			return ERR_PTR(dev_err_probe(dev, ret, "Failed to get last key"));
   211	
   212		/* Enable notifications */
   213		apple_smc_write_flag(smc, SMC_KEY(NTAP), 1);
   214	
   215		dev_info(dev, "Initialized (%d keys %p4ch..%p4ch)\n",
   216			 smc->key_count, &smc->first_key, &smc->last_key);
   217	
   218		dev_set_drvdata(dev, smc);
   219	
   220		ret = mfd_add_devices(dev, -1, apple_smc_devs, ARRAY_SIZE(apple_smc_devs), NULL, 0, NULL);
   221		if (ret)
   222			return ERR_PTR(dev_err_probe(dev, ret, "Subdevice initialization failed"));
   223	
   224		return smc;
   225	}
   226	EXPORT_SYMBOL(apple_smc_probe);
   227	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp