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-rw-r--r--net/ipv4/udp.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index bf6c406bf5e7..f900cdd0fbfb 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1933,14 +1933,16 @@ drop:
/* For TCP sockets, sk_rx_dst is protected by socket lock
* For UDP, we use xchg() to guard against concurrent changes.
*/
-void udp_sk_rx_dst_set(struct sock *sk, struct dst_entry *dst)
+bool udp_sk_rx_dst_set(struct sock *sk, struct dst_entry *dst)
{
struct dst_entry *old;
if (dst_hold_safe(dst)) {
old = xchg(&sk->sk_rx_dst, dst);
dst_release(old);
+ return old != dst;
}
+ return false;
}
EXPORT_SYMBOL(udp_sk_rx_dst_set);