WARNING: 'capabilties' may be misspelled - perhaps 'capabilities'?
#19: 
PHY not present. We also deal with no capabilties provided.
                                      ^^^^^^^^^^^

WARNING: Possible repeated word: 'at'
#174: FILE: drivers/net/phy/phylink.c:1290:
+			/* Either in-band not supported at at least one end.

total: 0 errors, 2 warnings, 0 checks, 194 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 629c96e9a1bd ("net: phylink: add negotiation of in-band capabilities") 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, 2 warnings, 0 checks, 194 lines checked