diff options
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/cls_api.c | 2 | ||||
| -rw-r--r-- | net/sched/sch_generic.c | 4 |
2 files changed, 5 insertions, 1 deletions
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index 4591b87eaab5..6708b6953bfa 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -373,6 +373,8 @@ void tcf_block_put(struct tcf_block *block) { struct tcf_block_ext_info ei = {0, }; + if (!block) + return; tcf_block_put_ext(block, block->q, &ei); } diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c index 28b2a7964133..cc069b2acf0e 100644 --- a/net/sched/sch_generic.c +++ b/net/sched/sch_generic.c @@ -1261,6 +1261,8 @@ void mini_qdisc_pair_swap(struct mini_Qdisc_pair *miniqp, if (!tp_head) { RCU_INIT_POINTER(*miniqp->p_miniq, NULL); + /* Wait for flying RCU callback before it is freed. */ + rcu_barrier_bh(); return; } @@ -1276,7 +1278,7 @@ void mini_qdisc_pair_swap(struct mini_Qdisc_pair *miniqp, rcu_assign_pointer(*miniqp->p_miniq, miniq); if (miniq_old) - /* This is counterpart of the rcu barrier above. We need to + /* This is counterpart of the rcu barriers above. We need to * block potential new user of miniq_old until all readers * are not seeing it. */ |