tc: check for errors in gen_rate_estimator creation
The functions gen_new_estimator and gen_replace_estimator can return
errors, but they were being ignored.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_drr.c b/net/sched/sch_drr.c
index e7a7e87..f6b4fa9 100644
--- a/net/sched/sch_drr.c
+++ b/net/sched/sch_drr.c
@@ -82,15 +82,19 @@
quantum = psched_mtu(qdisc_dev(sch));
if (cl != NULL) {
+ if (tca[TCA_RATE]) {
+ err = gen_replace_estimator(&cl->bstats, &cl->rate_est,
+ qdisc_root_sleeping_lock(sch),
+ tca[TCA_RATE]);
+ if (err)
+ return err;
+ }
+
sch_tree_lock(sch);
if (tb[TCA_DRR_QUANTUM])
cl->quantum = quantum;
sch_tree_unlock(sch);
- if (tca[TCA_RATE])
- gen_replace_estimator(&cl->bstats, &cl->rate_est,
- qdisc_root_sleeping_lock(sch),
- tca[TCA_RATE]);
return 0;
}
@@ -106,10 +110,16 @@
if (cl->qdisc == NULL)
cl->qdisc = &noop_qdisc;
- if (tca[TCA_RATE])
- gen_replace_estimator(&cl->bstats, &cl->rate_est,
- qdisc_root_sleeping_lock(sch),
- tca[TCA_RATE]);
+ if (tca[TCA_RATE]) {
+ err = gen_replace_estimator(&cl->bstats, &cl->rate_est,
+ qdisc_root_sleeping_lock(sch),
+ tca[TCA_RATE]);
+ if (err) {
+ qdisc_destroy(cl->qdisc);
+ kfree(cl);
+ return err;
+ }
+ }
sch_tree_lock(sch);
qdisc_class_hash_insert(&q->clhash, &cl->common);