[PATCH 6.1.y 1/2] selftests: mptcp: join: implicit: stop transfer after last check

["Matthieu Baerts (NGI0)" <matttbe@kernel.org>]

With this kernel version, the 'implicit EP' MPTCP Join selftest ended
with an error message:

  115 implicit EP                          creation[ ok ]
                                           ID change is prevented[ ok ]
                                           modif is allowed[ ok ]
  TcpPassiveOpens                 2                  0.0
  TcpEstabResets                  2                  0.0
  TcpInSegs                       315                0.0
  TcpOutSegs                      617                0.0
  TcpOutRsts                      1                  0.0
  TcpExtDelayedACKs               289                0.0
  TcpExtTCPPureAcks               6                  0.0
  TcpExtTCPOrigDataSent           306                0.0
  TcpExtTCPDelivered              306                0.0
  MPTcpExtMPCapableSYNRX          1                  0.0
  MPTcpExtMPCapableACKRX          1                  0.0
  MPTcpExtMPJoinSynRx             1                  0.0
  MPTcpExtMPJoinAckRx             1                  0.0
  MPTcpExtAddAddr                 1                  0.0
  MPTcpExtEchoAdd                 1                  0.0
  MPTcpExtMPFastcloseTx           1                  0.0
  MPTcpExtMPRstTx                 1                  0.0
  MPTcpExtMPRstRx                 1                  0.0
  TcpActiveOpens                  2                  0.0
  TcpEstabResets                  2                  0.0
  TcpInSegs                       617                0.0
  TcpOutSegs                      315                0.0
  TcpOutRsts                      1                  0.0
  TcpExtTCPPureAcks               308                0.0
  TcpExtTCPOrigDataSent           306                0.0
  TcpExtTCPDelivered              307                0.0
  MPTcpExtMPCapableSYNTX          1                  0.0
  MPTcpExtMPCapableSYNACKRX       1                  0.0
  MPTcpExtMPJoinSynAckRx          1                  0.0
  MPTcpExtAddAddr                 1                  0.0
  MPTcpExtEchoAdd                 1                  0.0
  MPTcpExtMPFastcloseRx           1                  0.0
  MPTcpExtMPRstTx                 1                  0.0
  MPTcpExtMPRstRx                 1                  0.0
  MPTcpExtRcvWndShared            1                  0.0

That's because the test was waiting for the end of the transfer for no
reasons, which ended after a timeout with an error. In this case, the
stats were displayed, but this error was ignored: the end of transfer is
not validated in this test.

To fix that, stop the transfer after the last check, similar to what is
done in the other tests.

Fixes: 699879d5f866 ("selftests: mptcp: join: endpoints: longer transfer")
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
---
 tools/testing/selftests/net/mptcp/mptcp_join.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testing/selftests/net/mptcp/mptcp_join.sh
index 80497053fe2f..044ba9c4e169 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -3429,6 +3429,7 @@ endpoint_tests()
 		pm_nl_set_limits $ns2 2 2
 		pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
 		run_tests $ns1 $ns2 10.0.1.1 128 0 0 slow 2>/dev/null &
+		local tests_pid=$!
 
 		wait_mpj $ns1
 		pm_nl_check_endpoint 1 "creation" \
@@ -3441,6 +3442,7 @@ endpoint_tests()
 		pm_nl_add_endpoint $ns2 10.0.2.2 flags signal
 		pm_nl_check_endpoint 0 "modif is allowed" \
 			$ns2 10.0.2.2 id 1 flags signal
+		kill_wait "${tests_pid}"
 		kill_tests_wait
 	fi
 
-- 
2.53.0