[B/D/E/F/G][Unstable][PATCH 2/2][SRU] selftests: rtnetlink: make kci_test_encap() return sub-test result

[Po-Hsu Lin]

BugLink: https://bugs.launchpad.net/bugs/1890136

kci_test_encap() is actually composed by two different sub-tests,
kci_test_encap_vxlan() and kci_test_encap_fou()

Therefore we should check the test result of these two in
kci_test_encap() to let the script be aware of the pass / fail status.
Otherwise it will generate false-negative result like below:
    $ sudo ./test.sh
    PASS: policy routing
    PASS: route get
    PASS: preferred_lft addresses have expired
    PASS: promote_secondaries complete
    PASS: tc htb hierarchy
    PASS: gre tunnel endpoint
    PASS: gretap
    PASS: ip6gretap
    PASS: erspan
    PASS: ip6erspan
    PASS: bridge setup
    PASS: ipv6 addrlabel
    PASS: set ifalias 5b193daf-0a08-46d7-af2c-e7aadd422ded for test-dummy0
    PASS: vrf
    PASS: vxlan
    FAIL: can't add fou port 7777, skipping test
    PASS: macsec
    PASS: bridge fdb get
    PASS: neigh get
    $ echo $?
    0

Signed-off-by: Po-Hsu Lin <po-hsu.lin at canonical.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
(cherry picked from commit 72f70c159b53e1363191953875e0223ed959e143)
Signed-off-by: Po-Hsu Lin <po-hsu.lin at canonical.com>
---
 tools/testing/selftests/net/rtnetlink.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/testing/selftests/net/rtnetlink.sh b/tools/testing/selftests/net/rtnetlink.sh
index 9db66be..7c38a90 100755
--- a/tools/testing/selftests/net/rtnetlink.sh
+++ b/tools/testing/selftests/net/rtnetlink.sh
@@ -564,9 +564,12 @@ kci_test_encap()
 	check_err $?
 
 	kci_test_encap_vxlan "$testns"
+	check_err $?
 	kci_test_encap_fou "$testns"
+	check_err $?
 
 	ip netns del "$testns"
+	return $ret
 }
 
 kci_test_macsec()
-- 
2.7.4