diff --git a/[refs] b/[refs]
index 46efcf412e94..cfe28850c8e5 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: dbd6b11e15a2f96030da17dbeda943a8a98ee990
+refs/heads/master: 15c041759bfcd9ab0a4e43f1c16e2644977d0467
diff --git a/trunk/net/ipv4/tcp.c b/trunk/net/ipv4/tcp.c
index 2109ff4a1daf..bf9a8ab29459 100644
--- a/trunk/net/ipv4/tcp.c
+++ b/trunk/net/ipv4/tcp.c
@@ -1762,8 +1762,14 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 		}
 
 #ifdef CONFIG_NET_DMA
-		if (tp->ucopy.dma_chan)
-			dma_async_memcpy_issue_pending(tp->ucopy.dma_chan);
+		if (tp->ucopy.dma_chan) {
+			if (tp->rcv_wnd == 0 &&
+			    !skb_queue_empty(&sk->sk_async_wait_queue)) {
+				tcp_service_net_dma(sk, true);
+				tcp_cleanup_rbuf(sk, copied);
+			} else
+				dma_async_memcpy_issue_pending(tp->ucopy.dma_chan);
+		}
 #endif
 		if (copied >= target) {
 			/* Do not sleep, just process backlog. */