WARNING: line length of 83 exceeds 80 columns
#39: FILE: tools/testing/selftests/net/mptcp/pm_nl_ctl.c:195:
+					if (flags & MPTCP_PM_EV_FLAG_DENY_JOIN_ID0)

WARNING: line length of 84 exceeds 80 columns
#40: FILE: tools/testing/selftests/net/mptcp/pm_nl_ctl.c:196:
+						fprintf(stderr, ",deny_join_id0:1");

WARNING: line length of 191 exceeds 80 columns
#87: FILE: tools/testing/selftests/net/mptcp/userspace_pm.sh:250:
+		test_fail "Expected tokens (c:${client_token} - s:${server_token}), server (c:${client_serverside} - s:${server_serverside}), nojoin (c:${client_nojoin} - s:${server_nojoin})"

total: 0 errors, 3 warnings, 0 checks, 53 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit 42816bc57c70 ("selftests: mptcp: userspace pm: validate deny-join-id0 flag") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 3 warnings, 0 checks, 53 lines checked