WARNING: line length of 83 exceeds 80 columns
#67: FILE: tools/testing/selftests/net/arp_no_invalid_sha_poision.sh:30:
+	ip netns exec "${PEER_NS}" ip route add default via "${V4_ADDR0}" dev veth1

WARNING: line length of 81 exceeds 80 columns
#107: FILE: tools/testing/selftests/net/arp_no_invalid_sha_poision.sh:70:
+		echo "ERROR: unable to ARP poision with a valid MAC ${VALID_MAC}"

total: 0 errors, 2 warnings, 0 checks, 180 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 84eb7f10ef72 ("selftests/net: add no ARP b/mcast,null poison test") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES 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, 2 warnings, 0 checks, 180 lines checked