WARNING: 'doesnt' may be misspelled - perhaps 'doesn't'?
#20: 
and doesnt delete qdisc because refcnt is not 0;  "qdisc del" exits
    ^^^^^^

CHECK: Comparison to NULL could be written "!sch"
#284: FILE: net/sched/sch_api.c:815:
+		if (sch == NULL || IS_ERR(sch)) {

CHECK: Comparison to NULL could be written "!sch"
#285: FILE: net/sched/sch_api.c:816:
+			WARN_ON_ONCE(parentid != TC_H_ROOT && sch == NULL);

total: 0 errors, 1 warnings, 2 checks, 613 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 660e84dc75d5 ("net/sched: Mark qdisc for deletion if graft cannot delete") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES 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, 2 checks, 613 lines checked