WARNING: line length of 88 exceeds 80 columns
#106: FILE: tools/testing/selftests/drivers/net/hw/ncdevmem.c:424:
+		fprintf(stderr, "Error: device has neither combined nor rx channels\n");

total: 0 errors, 1 warnings, 0 checks, 90 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 cff9eb5fd43a ("selftests: drv-net: ncdevmem: make configure_channels() support combined channels") 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, 1 warnings, 0 checks, 90 lines checked