diff options
Diffstat (limited to 'net/sched/cls_u32.c')
| -rw-r--r-- | net/sched/cls_u32.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c index 246f9065ce3..07372f60bee 100644 --- a/net/sched/cls_u32.c +++ b/net/sched/cls_u32.c @@ -387,7 +387,7 @@ static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) static void u32_destroy(struct tcf_proto *tp) { struct tc_u_common *tp_c = tp->data; - struct tc_u_hnode *root_ht = xchg(&tp->root, NULL); + struct tc_u_hnode *root_ht = tp->root; WARN_ON(root_ht == NULL); @@ -479,7 +479,7 @@ static int u32_set_parms(struct tcf_proto *tp, unsigned long base, err = -EINVAL; if (tb[TCA_U32_LINK]) { u32 handle = nla_get_u32(tb[TCA_U32_LINK]); - struct tc_u_hnode *ht_down = NULL; + struct tc_u_hnode *ht_down = NULL, *ht_old; if (TC_U32_KEY(handle)) goto errout; @@ -493,11 +493,12 @@ static int u32_set_parms(struct tcf_proto *tp, unsigned long base, } tcf_tree_lock(tp); - ht_down = xchg(&n->ht_down, ht_down); + ht_old = n->ht_down; + n->ht_down = ht_down; tcf_tree_unlock(tp); - if (ht_down) - ht_down->refcnt--; + if (ht_old) + ht_old->refcnt--; } if (tb[TCA_U32_CLASSID]) { n->res.classid = nla_get_u32(tb[TCA_U32_CLASSID]); @@ -637,8 +638,9 @@ static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle, break; n->next = *ins; - wmb(); + tcf_tree_lock(tp); *ins = n; + tcf_tree_unlock(tp); *arg = (unsigned long)n; return 0; |