WARNING: line length of 81 exceeds 80 columns
#277: FILE: tools/testing/selftests/drivers/net/hw/iou-zcrx.c:408:
+		ret = pthread_create(&threads[i], NULL, server_worker, &ctxs[i]);

WARNING: line length of 83 exceeds 80 columns
#323: FILE: tools/testing/selftests/drivers/net/hw/iou-zcrx.c:448:
+				error(1, errno, "getsockopt(SO_INCOMING_NAPI_ID)");

WARNING: quoted string split across lines
#360: FILE: tools/testing/selftests/drivers/net/hw/iou-zcrx.c:533:
 	error(1, 0, "Usage: %s (-4|-6) (-s|-c) -h<server_ip> -p<port> "
+		    "-l<payload_size> -i<ifname> -q<rxq_id> -t<num_threads> "

WARNING: quoted string split across lines
#361: FILE: tools/testing/selftests/drivers/net/hw/iou-zcrx.c:534:
+		    "-l<payload_size> -i<ifname> -q<rxq_id> -t<num_threads> "
+		    "-n<napi_id_csv>", filepath);

total: 0 errors, 4 warnings, 0 checks, 351 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 9437d20a6ddb ("selftests: net: add multithread server support to iou-zcrx") 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, 4 warnings, 0 checks, 351 lines checked