net/sched: sch_qfq: warn about class in use while deleting

Add extack to warn that delete was rejected because
the class is still in use

Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index 7addc15f01b5cf64d10de440653a2989d52b5339..1a25752f1a9a61dd61445ffef63f03d6e28a01a9 100644 (file)
--- a/net/sched/sch_qfq.c
+++ b/net/sched/sch_qfq.c
@@ -543,8 +543,10 @@ static int qfq_delete_class(struct Qdisc *sch, unsigned long arg,
        struct qfq_sched *q = qdisc_priv(sch);
        struct qfq_class *cl = (struct qfq_class *)arg;
 
-       if (qdisc_class_in_use(&cl->common))
+       if (qdisc_class_in_use(&cl->common)) {
+               NL_SET_ERR_MSG_MOD(extack, "QFQ class in use");
                return -EBUSY;
+       }
 
        sch_tree_lock(sch);