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-rw-r--r--net/phonet/socket.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/phonet/socket.c b/net/phonet/socket.c
index 6e9848bf0370..7c91f739f138 100644
--- a/net/phonet/socket.c
+++ b/net/phonet/socket.c
@@ -281,7 +281,9 @@ static unsigned int pn_socket_poll(struct file *file, struct socket *sock,
if (!mask && sk->sk_state == TCP_CLOSE_WAIT)
return POLLHUP;
- if (sk->sk_state == TCP_ESTABLISHED && atomic_read(&pn->tx_credits))
+ if (sk->sk_state == TCP_ESTABLISHED &&
+ atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf &&
+ atomic_read(&pn->tx_credits))
mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
return mask;