Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

[firefly-linux-kernel-4.4.55.git] / net / sunrpc / xprtsock.c

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 1ba4172074659fb0ef86c214464c5a6e4b4e60ff..27b6f55fa43a87fe98fddb946aeac015ecd1f6ab 100644 (file)
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -474,7 +474,16 @@ static int xs_nospace(struct rpc_task *task)
        spin_unlock_bh(&xprt->transport_lock);
 
        /* Race breaker in case memory is freed before above code is called */
-       sk->sk_write_space(sk);
+       if (ret == -EAGAIN) {
+               struct socket_wq *wq;
+
+               rcu_read_lock();
+               wq = rcu_dereference(sk->sk_wq);
+               set_bit(SOCKWQ_ASYNC_NOSPACE, &wq->flags);
+               rcu_read_unlock();
+
+               sk->sk_write_space(sk);
+       }
        return ret;
 }