[linux-next:master 6049/11059] drivers/net/ethernet/mediatek/mtk_ppe_offload.c:89:19: sparse: sparse: cast to restricted __be32

[linux-next:master 6049/11059] drivers/net/ethernet/mediatek/mtk_ppe_offload.c:89:19: sparse: sparse: cast to restricted __be32

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   6145d80cfc62e3ed8f16ff584d6287e6d88b82b9
commit: 502e84e2382d92654a2ecbc52cdbdb5a11cdcec7 [6049/11059] net: ethernet: mtk_eth_soc: add flow offloading support
config: arm64-randconfig-s032-20210409 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
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: v0.6.3-279-g6d5d9b42-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=502e84e2382d92654a2ecbc52cdbdb5a11cdcec7
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 502e84e2382d92654a2ecbc52cdbdb5a11cdcec7
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm64 

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


sparse warnings: (new ones prefixed by >>)
>> drivers/net/ethernet/mediatek/mtk_ppe_offload.c:89:19: sparse: sparse: cast to restricted __be32
>> drivers/net/ethernet/mediatek/mtk_ppe_offload.c:93:41: sparse: sparse: restricted __be32 degrades to integer
   drivers/net/ethernet/mediatek/mtk_ppe_offload.c:46:10: sparse: sparse: Initializer entry defined twice
   drivers/net/ethernet/mediatek/mtk_ppe_offload.c:47:10: sparse:   also defined here

vim +89 drivers/net/ethernet/mediatek/mtk_ppe_offload.c

    83	
    84	
    85	static int
    86	mtk_flow_mangle_ports(const struct flow_action_entry *act,
    87			      struct mtk_flow_data *data)
    88	{
  > 89		u32 val = ntohl(act->mangle.val);
    90	
    91		switch (act->mangle.offset) {
    92		case 0:
  > 93			if (act->mangle.mask == ~htonl(0xffff))
    94				data->dst_port = cpu_to_be16(val);
    95			else
    96				data->src_port = cpu_to_be16(val >> 16);
    97			break;
    98		case 2:
    99			data->dst_port = cpu_to_be16(val);
   100			break;
   101		default:
   102			return -EINVAL;
   103		}
   104	
   105		return 0;
   106	}
   107	

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

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