[PATCH net-next v2] vsock/vmci: use sk_acceptq_is_full() helper

[PATCH net-next v2] vsock/vmci: use sk_acceptq_is_full() helper

[Raf Dickson]

Replace the open-coded backlog check with sk_acceptq_is_full().
The helper uses > instead of >=, which is the correct comparison
per commit 64a146513f8f ("[NET]: Revert incorrect accept queue
backlog changes."), and adds READ_ONCE() for proper memory ordering.

Suggested-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Raf Dickson <rafdog35@gmail.com>
---
 net/vmw_vsock/hyperv_transport.c | 2 +-
 net/vmw_vsock/vmci_transport.c   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
index b3394946b2..e6adbc4701 100644
--- a/net/vmw_vsock/hyperv_transport.c
+++ b/net/vmw_vsock/hyperv_transport.c
@@ -323,7 +323,7 @@ static void hvs_open_connection(struct vmbus_channel *chan)
 		goto out;
 
 	if (conn_from_host) {
-		if (sk->sk_ack_backlog >= sk->sk_max_ack_backlog)
+		if (sk_acceptq_is_full(sk))
 			goto out;
 
 		new = vsock_create_connected(sk);
diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c
index 91516488a7..56503bee31 100644
--- a/net/vmw_vsock/vmci_transport.c
+++ b/net/vmw_vsock/vmci_transport.c
@@ -1010,7 +1010,7 @@ static int vmci_transport_recv_listen(struct sock *sk,
 	 * reset.  Otherwise we create and initialize a child socket and reply
 	 * with a connection negotiation.
 	 */
-	if (sk->sk_ack_backlog >= sk->sk_max_ack_backlog) {
+	if (sk_acceptq_is_full(sk)) {
 		vmci_transport_reply_reset(pkt);
 		return -ECONNREFUSED;
 	}
-- 
2.54.0