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Diffstat (limited to 'net/sched/cls_u32.c')
-rw-r--r--net/sched/cls_u32.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 246f9065ce3..05d178008cb 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]);