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-rw-r--r--net/atm/signaling.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/atm/signaling.c b/net/atm/signaling.c
index f640a99e14b8..983c3a21a133 100644
--- a/net/atm/signaling.c
+++ b/net/atm/signaling.c
@@ -67,7 +67,7 @@ static int sigd_send(struct atm_vcc *vcc, struct sk_buff *skb)
struct sock *sk;
msg = (struct atmsvc_msg *) skb->data;
- atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+ WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
vcc = *(struct atm_vcc **) &msg->vcc;
pr_debug("%d (0x%lx)\n", (int)msg->type, (unsigned long)vcc);
sk = sk_atm(vcc);