Subject: Re: [PATCH net-next] net/tls: Use RCU API to access tls_ctx->netdev

From: kernel test robot <[email-masked]>
Date: Wed, 3 Aug 2022 00:26:07 +0800

Hi Maxim,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Maxim-Mikityanskiy/net-tls-Use-RCU-API-to-access-tls_ctx-netdev/20220801-160258
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 63757225a93353bc2ce4499af5501eabdbbf23f9
config: mips-randconfig-s043-20220801 (https://download.01.org/0day-ci/archive/20220803/[email-masked]/config)
compiler: mips-linux-gcc (GCC) 12.1.0
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: v0.6.4-39-gce1a6720-dirty
        # https://github.com/intel-lab-lkp/linux/commit/9971662af97683a6f0ea3d752495bba5ef6229dc
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Maxim-Mikityanskiy/net-tls-Use-RCU-API-to-access-tls_ctx-netdev/20220801-160258
        git checkout 9971662af97683a6f0ea3d752495bba5ef6229dc
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=mips SHELL=/bin/bash drivers/net/bonding/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <[email-masked]>

sparse warnings: (new ones prefixed by >>)
   drivers/net/bonding/bond_main.c:2831:26: sparse: sparse: restricted __be16 degrades to integer
   drivers/net/bonding/bond_main.c:2837:20: sparse: sparse: restricted __be16 degrades to integer
   drivers/net/bonding/bond_main.c:2910:40: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __be16 [usertype] vlan_proto @@     got int @@
   drivers/net/bonding/bond_main.c:2910:40: sparse:     expected restricted __be16 [usertype] vlan_proto
   drivers/net/bonding/bond_main.c:2910:40: sparse:     got int
>> drivers/net/bonding/bond_main.c:5336:13: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected struct net_device *slave_dev @@     got struct net_device [noderef] __rcu *netdev @@
   drivers/net/bonding/bond_main.c:5336:13: sparse:     expected struct net_device *slave_dev
   drivers/net/bonding/bond_main.c:5336:13: sparse:     got struct net_device [noderef] __rcu *netdev
   drivers/net/bonding/bond_main.c:5337:75: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected struct net_device *slave_dev @@     got struct net_device [noderef] __rcu *netdev @@
   drivers/net/bonding/bond_main.c:5337:75: sparse:     expected struct net_device *slave_dev
   drivers/net/bonding/bond_main.c:5337:75: sparse:     got struct net_device [noderef] __rcu *netdev

vim +5336 drivers/net/bonding/bond_main.c

007feb87fb1593 Tariq Toukan 2021-01-17  5331  
89df6a8104706f Tariq Toukan 2021-01-17  5332  #if IS_ENABLED(CONFIG_TLS_DEVICE)
89df6a8104706f Tariq Toukan 2021-01-17  5333  static netdev_tx_t bond_tls_device_xmit(struct bonding *bond, struct sk_buff *skb,
89df6a8104706f Tariq Toukan 2021-01-17  5334  					struct net_device *dev)
89df6a8104706f Tariq Toukan 2021-01-17  5335  {
89df6a8104706f Tariq Toukan 2021-01-17 @5336  	if (likely(bond_get_slave_by_dev(bond, tls_get_ctx(skb->sk)->netdev)))
89df6a8104706f Tariq Toukan 2021-01-17  5337  		return bond_dev_queue_xmit(bond, skb, tls_get_ctx(skb->sk)->netdev);
89df6a8104706f Tariq Toukan 2021-01-17  5338  	return bond_tx_drop(dev, skb);
89df6a8104706f Tariq Toukan 2021-01-17  5339  }
89df6a8104706f Tariq Toukan 2021-01-17  5340  #endif
89df6a8104706f Tariq Toukan 2021-01-17  5341  

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