WARNING: line length of 87 exceeds 80 columns
#286: FILE: net/ethtool/module.c:387:
+		NL_SET_ERR_MSG(extack, "Module firmware flashing already in progress");

WARNING: line length of 88 exceeds 80 columns
#291: FILE: net/ethtool/module.c:392:
+		NL_SET_ERR_MSG(extack, "Netdevice is up, so flashing is not permitted");

WARNING: line length of 90 exceeds 80 columns
#296: FILE: net/ethtool/module.c:397:
+		NL_SET_ERR_MSG(extack, "Can't perform firmware flashing on a split port");

CHECK: No space is necessary after a cast
#417: FILE: net/ethtool/netlink.c:1179:
+		.maxattr = ARRAY_SIZE(ethnl_module_fw_flash_act_policy) - 1,

WARNING: line length of 104 exceeds 80 columns
#459: FILE: net/ethtool/netlink.h:458:
+extern const struct nla_policy ethnl_module_fw_flash_act_policy[ETHTOOL_A_MODULE_FW_FLASH_PASSWORD + 1];

total: 0 errors, 4 warnings, 1 checks, 409 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 c5b5c09d532d ("ethtool: Add ability to flash transceiver modules' firmware") 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, 4 warnings, 1 checks, 409 lines checked