netdev - Re: [PATCH net-next v2 2/6] virtio_net: Remove command data from control

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Message-ID: <202403290542.gM5D7hMG-lkp@intel.com>
Date: Fri, 29 Mar 2024 05:58:14 +0800
From: kernel test robot <lkp@...el.com>
To: Daniel Jurgens <danielj@...dia.com>, netdev@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev, mst@...hat.com, jasowang@...hat.com,
	xuanzhuo@...ux.alibaba.com, virtualization@...ts.linux.dev,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, jiri@...dia.com,
	Daniel Jurgens <danielj@...dia.com>
Subject: Re: [PATCH net-next v2 2/6] virtio_net: Remove command data from
 control_buf

Hi Daniel,

kernel test robot noticed the following build warnings:

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

url:    https://github.com/intel-lab-lkp/linux/commits/Daniel-Jurgens/virtio_net-Store-RSS-setting-in-virtnet_info/20240328-125022
base:   net-next/main
patch link:    https://lore.kernel.org/r/20240328044715.266641-3-danielj%40nvidia.com
patch subject: [PATCH net-next v2 2/6] virtio_net: Remove command data from control_buf
config: x86_64-randconfig-122-20240328 (https://download.01.org/0day-ci/archive/20240329/202403290542.gM5D7hMG-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240329/202403290542.gM5D7hMG-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403290542.gM5D7hMG-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/net/virtio_net.c:3978:20: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long long [usertype] @@     got restricted __virtio64 @@
   drivers/net/virtio_net.c:3978:20: sparse:     expected unsigned long long [usertype]
   drivers/net/virtio_net.c:3978:20: sparse:     got restricted __virtio64

vim +3978 drivers/net/virtio_net.c

  3968	
  3969	static int virtnet_set_guest_offloads(struct virtnet_info *vi, u64 offloads)
  3970	{
  3971		u64 *_offloads __free(kfree) = NULL;
  3972		struct scatterlist sg;
  3973	
  3974		_offloads = kzalloc(sizeof(*_offloads), GFP_KERNEL);
  3975		if (!_offloads)
  3976			return -ENOMEM;
  3977	
> 3978		*_offloads = cpu_to_virtio64(vi->vdev, offloads);
  3979	
  3980		sg_init_one(&sg, _offloads, sizeof(*_offloads));
  3981	
  3982		if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_GUEST_OFFLOADS,
  3983					  VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET, &sg)) {
  3984			dev_warn(&vi->dev->dev, "Fail to set guest offload.\n");
  3985			return -EINVAL;
  3986		}
  3987	
  3988		return 0;
  3989	}
  3990	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki