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

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Message-ID: <202009020835.dmWcHHcX%lkp@intel.com>
Date:   Wed, 2 Sep 2020 08:40:38 +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:   b765a32a2e9170702467747e290614be072c4f76
commit: 1f62cfa19a619f82c098468660b7950477101d45 hinic: add net_device_ops associated with vf
date:   4 months ago
config: i386-randconfig-s001-20200902 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-191-g10164920-dirty
        git checkout 1f62cfa19a619f82c098468660b7950477101d45
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 

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/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

# 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
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

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