Re: [PATCH mptcp-next v16 6/8] mptcp: add bpf_mptcp_sched_ops

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

Hi Geliang,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on mptcp/export]
[cannot apply to bpf-next/master bpf/master linus/master v5.18-rc4 next-20220427]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/intel-lab-lkp/linux/commits/Geliang-Tang/BPF-packet-scheduler/20220427-095943
base:   https://github.com/multipath-tcp/mptcp_net-next.git export
config: i386-randconfig-m021 (https://download.01.org/0day-ci/archive/20220427/202204272125.AiqJUAjR-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

smatch warnings:
net/mptcp/bpf.c:148 bpf_mptcp_sched_init() warn: unsigned 'mptcp_sched_id' is never less than zero.

vim +/mptcp_sched_id +148 net/mptcp/bpf.c

   143	
   144	static int bpf_mptcp_sched_init(struct btf *btf)
   145	{
   146		mptcp_sched_id = btf_find_by_name_kind(btf, "mptcp_sched_data",
   147						       BTF_KIND_STRUCT);
 > 148		if (mptcp_sched_id < 0)
   149			return -EINVAL;
   150		mptcp_sched_type = btf_type_by_id(btf, mptcp_sched_id);
   151	
   152		return 0;
   153	}
   154	

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