FAILED: patch "[PATCH] selftests: mptcp: add missing join check" failed to apply to 5.15-stable tree

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 857898eb4b28daf3faca3ae334c78b2bb141475e Mon Sep 17 00:00:00 2001
From: Matthieu Baerts <[email protected]>
Date: Wed, 9 Feb 2022 17:25:07 -0800
Subject: [PATCH] selftests: mptcp: add missing join check

This function also writes the name of the test with its ID, making clear a new test has been executed.

Without that, the ADD_ADDR results from this test was appended at the end of the previous test causing confusions. Especially when the second test was failing, we had:

17 signal invalid addresses syn[ ok ] - synack[ ok ] - ack[ ok ]
add[ ok ] - echo [ ok ] add[fail] got 2 ADD_ADDR[s] expected 3

In fact, this 17th test was OK but not the 18th one.

Now we have:

17 signal invalid addresses syn[ ok ] - synack[ ok ] - ack[ ok ]
add[ ok ] - echo [ ok ]
18 signal addresses race test syn[fail] got 2 JOIN[s] syn expected 3
- synack[fail] got 2 JOIN[s] synack expected
- ack[fail] got 2 JOIN[s] ack expected 3
add[fail] got 2 ADD_ADDR[s] expected 3

index b8bdbec0cf69..c0801df15f54 100755
@@ -1159,6 +1159,7 @@ signal_address_tests()
 	ip netns exec $ns2 ./pm_nl_ctl add 10.0.3.2 flags signal
 	ip netns exec $ns2 ./pm_nl_ctl add 10.0.4.2 flags signal
 	run_tests $ns1 $ns2 10.0.1.1
+	chk_join_nr "signal addresses race test" 3 3 3
 
 	# the server will not signal the address terminating
 	# the MPC subflow