[PATCH bpf-next] selftests/bpf: Initialize tc in xdp_synproxy

[Ilya Leoshkevich <iii@xxxxxxxxxxxxx>]

xdp_synproxy/xdp fails in CI with:

    Error: bpf_tc_hook_create: File exists

The XDP version of the test should not be calling bpf_tc_hook_create();
the reason it's happening anyway is that if we don't specify --tc on the
command line, tc variable remains uninitialized.

Fixes: 784d5dc0efc2 ("selftests/bpf: Add selftests for raw syncookie helpers in TC mode")
Reported-by: Alexei Starovoitov <ast@xxxxxxxxxx>
Reported-by: Joanne Koong <joannelkoong@xxxxxxxxx>
Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
---
 tools/testing/selftests/bpf/xdp_synproxy.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/bpf/xdp_synproxy.c b/tools/testing/selftests/bpf/xdp_synproxy.c
index 410a1385a01d..6dbe0b745198 100644
--- a/tools/testing/selftests/bpf/xdp_synproxy.c
+++ b/tools/testing/selftests/bpf/xdp_synproxy.c
@@ -116,6 +116,7 @@ static void parse_options(int argc, char *argv[], unsigned int *ifindex, __u32 *
 	*tcpipopts = 0;
 	*ports = NULL;
 	*single = false;
+	*tc = false;
 
 	while (true) {
 		int opt;
-- 
2.39.1