net/sched: sch_qfq: use extack on errors messages

Some error messages are still being printed to dmesg.
Since extack is available, provide error messages there.
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/sch_qfq.c

@@ -402,8 +402,8 @@ static int qfq_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
 	int err;
 	int delta_w;
 
-	if (tca[TCA_OPTIONS] == NULL) {
-		pr_notice("qfq: no options\n");
+	if (NL_REQ_ATTR_CHECK(extack, NULL, tca, TCA_OPTIONS)) {
+		NL_SET_ERR_MSG_MOD(extack, "missing options");
 		return -EINVAL;
 	}
 
@@ -442,8 +442,9 @@ static int qfq_change_class(struct Qdisc *sch, u32 classid, u32 parentid,
 	delta_w = weight - (cl ? cl->agg->class_weight : 0);
 
 	if (q->wsum + delta_w > QFQ_MAX_WSUM) {
-		pr_notice("qfq: total weight out of range (%d + %u)\n",
-			  delta_w, q->wsum);
+		NL_SET_ERR_MSG_FMT_MOD(extack,
+				       "total weight out of range (%d + %u)\n",
+				       delta_w, q->wsum);
 		return -EINVAL;
 	}