drivers/net/ethernet/huawei/hinic/hinic_main.c:796:25: sparse: sparse: cast to restricted __be16

From: kernel test robot
Date: Sat Oct 03 2020 - 00:16:41 EST


tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d3d45f8220d60a0b2aaaacf8fb2be4e6ffd9008e
commit: 1f62cfa19a619f82c098468660b7950477101d45 hinic: add net_device_ops associated with vf
date: 5 months ago
config: x86_64-randconfig-s022-20201003 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.2-201-g24bdaac6-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1f62cfa19a619f82c098468660b7950477101d45
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 1f62cfa19a619f82c098468660b7950477101d45
# save the attached .config to linux build tree
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64

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

echo
echo "sparse warnings: (new ones prefixed by >>)"
echo
>> drivers/net/ethernet/huawei/hinic/hinic_main.c:796:25: sparse: sparse: cast to restricted __be16
>> drivers/net/ethernet/huawei/hinic/hinic_main.c:796:25: sparse: sparse: cast to restricted __be16
>> drivers/net/ethernet/huawei/hinic/hinic_main.c:796:25: sparse: sparse: cast to restricted __be16
>> drivers/net/ethernet/huawei/hinic/hinic_main.c:796:25: sparse: sparse: cast to restricted __be16

vim +796 drivers/net/ethernet/huawei/hinic/hinic_main.c

778
779 static void hinic_tx_timeout(struct net_device *netdev, unsigned int txqueue)
780 {
781 struct hinic_dev *nic_dev = netdev_priv(netdev);
782 u16 sw_pi, hw_ci, sw_ci;
783 struct hinic_sq *sq;
784 u16 num_sqs, q_id;
785
786 num_sqs = hinic_hwdev_num_qps(nic_dev->hwdev);
787
788 netif_err(nic_dev, drv, netdev, "Tx timeout\n");
789
790 for (q_id = 0; q_id < num_sqs; q_id++) {
791 if (!netif_xmit_stopped(netdev_get_tx_queue(netdev, q_id)))
792 continue;
793
794 sq = hinic_hwdev_get_sq(nic_dev->hwdev, q_id);
795 sw_pi = atomic_read(&sq->wq->prod_idx) & sq->wq->mask;
> 796 hw_ci = be16_to_cpu(*(u16 *)(sq->hw_ci_addr)) & sq->wq->mask;
797 sw_ci = atomic_read(&sq->wq->cons_idx) & sq->wq->mask;
798 netif_err(nic_dev, drv, netdev, "Txq%d: sw_pi: %d, hw_ci: %d, sw_ci: %d, napi->state: 0x%lx\n",
799 q_id, sw_pi, hw_ci, sw_ci,
800 nic_dev->txqs[q_id].napi.state);
801 }
802 }
803

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

Attachment: .config.gz
Description: application/gzip