Failed check master hard-interface.c

WARNING: Prefer pr_warn(... to pr_warning(... #179: FILE: hard-interface.c:179: + pr_warning("The newly added mac address (%pM) already exists on: %s\n",

WARNING: Prefer pr_warn(... to pr_warning(... #181: FILE: hard-interface.c:181: + pr_warning("It is strongly recommended to keep mac addresses unique to avoid problems!\n");

total: 0 errors, 2 warnings, 0 checks, 583 lines checked

NOTE: Ignored message types: COMPLEX_MACRO

hard-interface.c has style problems, please review.

If any of these errors are false positives, please report them to the maintainer, see CHECKPATCH in MAINTAINERS.