netdev - Re: [PATCH net-next v2 2/3] ipv6: support sport and dport in RTM

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Date:   Mon, 7 May 2018 14:23:06 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Roopa Prabhu <roopa@...ulusnetworks.com>
Cc:     kbuild-all@...org, davem@...emloft.net, netdev@...r.kernel.org,
        dsa@...ulusnetworks.com, nikolay@...ulusnetworks.com,
        idosch@...lanox.com
Subject: Re: [PATCH net-next v2 2/3] ipv6: support sport and dport in
 RTM_GETROUTE

Hi Roopa,

Thank you for the patch! Perhaps something to improve:

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

url:    https://github.com/0day-ci/linux/commits/Roopa-Prabhu/fib-rule-selftest/20180507-094538
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

   net/ipv6/route.c:2591:15: sparse: expression using sizeof(void)
   net/ipv6/route.c:1391:15: sparse: expression using sizeof(void)
   net/ipv6/route.c:1590:36: sparse: incorrect type in initializer (different address spaces) @@    expected struct fib6_info *from @@    got struct fib6_info struct fib6_info *from @@
   net/ipv6/route.c:1590:36:    expected struct fib6_info *from
   net/ipv6/route.c:1590:36:    got struct fib6_info [noderef] <asn:4>*from
   net/ipv6/route.c:1968:39: sparse: incorrect type in assignment (different base types) @@    expected unsigned int [unsigned] [usertype] flow_label @@    got gned] [usertype] flow_label @@
   net/ipv6/route.c:1968:39:    expected unsigned int [unsigned] [usertype] flow_label
   net/ipv6/route.c:1968:39:    got restricted __be32
   net/ipv6/route.c:2311:15: sparse: expression using sizeof(void)
>> net/ipv6/route.c:4735:29: sparse: incorrect type in initializer (different base types) @@    expected int [signed] p @@    got restint [signed] p @@
   net/ipv6/route.c:4735:29:    expected int [signed] p
   net/ipv6/route.c:4735:29:    got restricted __be16
>> net/ipv6/route.c:4740:15: sparse: incorrect type in assignment (different base types) @@    expected restricted __be16 [usertype] <noident> @@    got 6 [usertype] <noident> @@
   net/ipv6/route.c:4740:15:    expected restricted __be16 [usertype] <noident>
   net/ipv6/route.c:4740:15:    got int [signed] p
   net/ipv6/route.c:3196:12: sparse: context imbalance in 'ip6_route_del' - wrong count at exit

vim +4735 net/ipv6/route.c

  4732	
  4733	static int nla_get_port(struct nlattr *attr, __be16 *port)
  4734	{
> 4735		int p = nla_get_be16(attr);
  4736	
  4737		if (p <= 0 || p >= 0xffff)
  4738			return -EINVAL;
  4739	
> 4740		*port = p;
  4741		return 0;
  4742	}
  4743	

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