samples/bpf: Fix the error return code of xdp_redirect's main()
stable inclusion from stable-5.10.50 commit e717f974ceedb8d045cf6c9ceed69289e545571c bugzilla: 174522 https://gitee.com/openeuler/kernel/issues/I4DNFY Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e717f974ceedb8d045cf6c9ceed69289e545571c -------------------------------- [ Upstream commit 7c6090ee ] Fix to return a negative error code from the error handling case instead of 0, as done elsewhere in this function. If bpf_map_update_elem() failed, main() should return a negative error. Fixes: 832622e6 ("xdp: sample program for new bpf_redirect helper") Signed-off-by: NWang Hai <wanghai38@huawei.com> Signed-off-by: NAndrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210616042534.315097-1-wanghai38@huawei.comSigned-off-by: NSasha Levin <sashal@kernel.org> Signed-off-by: NChen Jun <chenjun102@huawei.com> Acked-by: NWeilong Chen <chenweilong@huawei.com> Signed-off-by: NChen Jun <chenjun102@huawei.com> Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
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