[intel-linux-intel-lts:5.4/yocto 15747/18252] drivers/net/ethernet/intel/igc/igc_main.c:1531:31: sparse: sparse: cast to restricted __be16

[intel-linux-intel-lts:5.4/yocto 15747/18252] drivers/net/ethernet/intel/igc/igc_main.c:1531:31: sparse: sparse: cast to restricted __be16

[kernel test robot]

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tree:   https://github.com/intel/linux-intel-lts.git 5.4/yocto
head:   cfef018a5efc728040e938c270bbc68fc8124d33
commit: 838384fea3c5ff86d19b3fe3ef01d2be8d83d7d2 [15747/18252] igc: Enable VLAN Insertion and VLAN Stripping
config: x86_64-randconfig-s022-20210815 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-348-gf0e6938b-dirty
        # https://github.com/intel/linux-intel-lts/commit/838384fea3c5ff86d19b3fe3ef01d2be8d83d7d2
        git remote add intel-linux-intel-lts https://github.com/intel/linux-intel-lts.git
        git fetch --no-tags intel-linux-intel-lts 5.4/yocto
        git checkout 838384fea3c5ff86d19b3fe3ef01d2be8d83d7d2
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/net/ethernet/intel/igc/

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/intel/igc/igc_main.c:1531:31: sparse: sparse: cast to restricted __be16
>> drivers/net/ethernet/intel/igc/igc_main.c:1531:31: sparse: sparse: cast from restricted __le16
>> drivers/net/ethernet/intel/igc/igc_main.c:1531:31: sparse: sparse: cast to restricted __be16
>> drivers/net/ethernet/intel/igc/igc_main.c:1531:31: sparse: sparse: cast from restricted __le16
>> drivers/net/ethernet/intel/igc/igc_main.c:1531:31: sparse: sparse: cast to restricted __be16
>> drivers/net/ethernet/intel/igc/igc_main.c:1531:31: sparse: sparse: cast from restricted __le16
>> drivers/net/ethernet/intel/igc/igc_main.c:1531:31: sparse: sparse: cast to restricted __be16
>> drivers/net/ethernet/intel/igc/igc_main.c:1531:31: sparse: sparse: cast from restricted __le16

vim +1531 drivers/net/ethernet/intel/igc/igc_main.c

  1519	
  1520	static void igc_rx_vlan(struct igc_ring *rx_ring,
  1521				union igc_adv_rx_desc *rx_desc,
  1522				struct sk_buff *skb)
  1523	{
  1524		struct net_device *dev = rx_ring->netdev;
  1525		u16 vid;
  1526	
  1527		if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
  1528		    igc_test_staterr(rx_desc, IGC_RXD_STAT_VP)) {
  1529			if (igc_test_staterr(rx_desc, IGC_RXDEXT_STATERR_LB) &&
  1530			    test_bit(IGC_RING_FLAG_RX_LB_VLAN_BSWAP, &rx_ring->flags))
> 1531				vid = be16_to_cpu(rx_desc->wb.upper.vlan);
  1532			else
  1533				vid = le16_to_cpu(rx_desc->wb.upper.vlan);
  1534	
  1535			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
  1536		}
  1537	}
  1538	

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

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