WARNING: line length of 87 exceeds 80 columns
#101: FILE: include/uapi/linux/ethtool_netlink.h:505:
+	ETHTOOL_A_TS_HWTSTAMP_PROVIDER_MAX = (__ETHTOOL_A_TS_HWTSTAMP_PROVIDER_CNT - 1)

WARNING: line length of 93 exceeds 80 columns
#112: FILE: include/uapi/linux/ethtool_netlink.h:517:
+	ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER,		/* nest - *_TS_HWTSTAMP_PROVIDER_* */

WARNING: line length of 81 exceeds 80 columns
#347: FILE: net/ethtool/netlink.h:467:
+extern const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1];

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#362: 
new file mode 100644

CHECK: No space is necessary after a cast
#441: FILE: net/ethtool/tsinfo.c:49:
+			       ARRAY_SIZE(ethnl_ts_hwtst_prov_policy) - 1,

WARNING: line length of 84 exceeds 80 columns
#752: FILE: net/ethtool/tsinfo.c:459:
+			ctx->pos_phcqualifier = HWTSTAMP_PROVIDER_QUALIFIER_PRECISE;

total: 0 errors, 5 warnings, 1 checks, 736 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 e730e0ef691f ("net: ethtool: tsinfo: Enhance tsinfo to support several hwtstamp by net topology") 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, 5 warnings, 1 checks, 736 lines checked