Re: [PATCHv2 net-next 2/3] bonding: Add ESN support to IPSec HW offload

[kernel test robot <lkp@intel.com>]

Hi Hangbin,

kernel test robot noticed the following build errors:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Hangbin-Liu/bonding-add-common-function-to-check-ipsec-device/20240819-195504
base:   net-next/main
patch link:    https://lore.kernel.org/r/20240819075334.236334-3-liuhangbin%40gmail.com
patch subject: [PATCHv2 net-next 2/3] bonding: Add ESN support to IPSec HW offload
config: x86_64-buildonly-randconfig-001-20240820 (https://download.01.org/0day-ci/archive/20240820/202408200431.wjjkEZ2m-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240820/202408200431.wjjkEZ2m-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202408200431.wjjkEZ2m-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/net/bonding/bond_main.c:434:10: error: returning 'void *' from a function with incompatible result type 'struct net_device'
     434 |                 return NULL;
         |                        ^~~~
   include/linux/stddef.h:8:14: note: expanded from macro 'NULL'
       8 | #define NULL ((void *)0)
         |              ^~~~~~~~~~~
   drivers/net/bonding/bond_main.c:442:10: error: returning 'void *' from a function with incompatible result type 'struct net_device'
     442 |                 return NULL;
         |                        ^~~~
   include/linux/stddef.h:8:14: note: expanded from macro 'NULL'
       8 | #define NULL ((void *)0)
         |              ^~~~~~~~~~~
   drivers/net/bonding/bond_main.c:446:9: error: returning 'struct net_device *' from a function with incompatible result type 'struct net_device'; dereference with *
     446 |         return real_dev;
         |                ^~~~~~~~
         |                *
   drivers/net/bonding/bond_main.c:630:11: error: assigning to 'struct net_device *' from incompatible type 'struct net_device'
     630 |         real_dev = bond_ipsec_dev(xs);
         |                  ^ ~~~~~~~~~~~~~~~~~~
   drivers/net/bonding/bond_main.c:658:11: error: assigning to 'struct net_device *' from incompatible type 'struct net_device'
     658 |         real_dev = bond_ipsec_dev(xs);
         |                  ^ ~~~~~~~~~~~~~~~~~~
>> drivers/net/bonding/bond_main.c:668:2: error: use of undeclared identifier 'rhel_dev'; did you mean 'real_dev'?
     668 |         rhel_dev->xfrmdev_ops->xdo_dev_state_advance_esn(xs);
         |         ^~~~~~~~
         |         real_dev
   drivers/net/bonding/bond_main.c:655:21: note: 'real_dev' declared here
     655 |         struct net_device *real_dev;
         |                            ^
   6 errors generated.


vim +668 drivers/net/bonding/bond_main.c

   648	
   649	/**
   650	 * bond_advance_esn_state - ESN support for IPSec HW offload
   651	 * @xs: pointer to transformer state struct
   652	 **/
   653	static void bond_advance_esn_state(struct xfrm_state *xs)
   654	{
   655		struct net_device *real_dev;
   656	
   657		rcu_read_lock();
   658		real_dev = bond_ipsec_dev(xs);
   659		if (!real_dev)
   660			goto out;
   661	
   662		if (!real_dev->xfrmdev_ops ||
   663		    !real_dev->xfrmdev_ops->xdo_dev_state_advance_esn) {
   664			pr_warn("%s: %s doesn't support xdo_dev_state_advance_esn\n", __func__, real_dev->name);
   665			goto out;
   666		}
   667	
 > 668		rhel_dev->xfrmdev_ops->xdo_dev_state_advance_esn(xs);
   669	out:
   670		rcu_read_unlock();
   671	}
   672	

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