linux-kernel - drivers/net/ethernet/huawei/hinic/hinic_main.c:796:25: sparse: sparse: cast to restricted _

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Date:   Sat, 3 Oct 2020 12:15:58 +0800
From:   kernel test robot <lkp@...el.com>
To:     Luo bin <luobin9@...wei.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/net/ethernet/huawei/hinic/hinic_main.c:796:25: sparse:
 sparse: cast to restricted __be16

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@...el.com>

	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@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (36890 bytes)