Re: [PATCH net v9 2/2] virtio-net: correct hdr_len handling for tunnel gso

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

Hi Xuan,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Xuan-Zhuo/virtio-net-correct-hdr_len-handling-for-VIRTIO_NET_F_GUEST_HDRLEN/20260311-200042
base:   net/main
patch link:    https://lore.kernel.org/r/20260311115414.31243-3-xuanzhuo%40linux.alibaba.com
patch subject: [PATCH net v9 2/2] virtio-net: correct hdr_len handling for tunnel gso
config: i386-randconfig-061-20260312 (https://download.01.org/0day-ci/archive/20260312/202603122214.8Anoxrmq-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260312/202603122214.8Anoxrmq-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/202603122214.8Anoxrmq-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/net/virtio_net.c: note: in included file:
>> include/linux/virtio_net.h:238:22: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __virtio16 [usertype] hdr_len @@     got restricted __le16 [usertype] @@
   include/linux/virtio_net.h:238:22: sparse:     expected restricted __virtio16 [usertype] hdr_len
   include/linux/virtio_net.h:238:22: sparse:     got restricted __le16 [usertype]

vim +238 include/linux/virtio_net.h

   225	
   226	static inline void virtio_net_set_tnl_hdrlen(const struct sk_buff *skb,
   227						     struct virtio_net_hdr *hdr)
   228	{
   229		u16 hdr_len;
   230	
   231		hdr_len = skb_inner_transport_offset(skb);
   232	
   233		if (hdr->gso_type == VIRTIO_NET_HDR_GSO_UDP_L4)
   234			hdr_len += sizeof(struct udphdr);
   235		else
   236			hdr_len += inner_tcp_hdrlen(skb);
   237	
 > 238		hdr->hdr_len = cpu_to_le16(hdr_len);
   239	}
   240	

-- 
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https://github.com/intel/lkp-tests/wiki