Phonet: do not set POLLOUT in case of send buffer overflow

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
mariux64 · Aug 31, 2010 · 01b3860 · 01b3860
1 parent 02ac326
commit 01b3860
Showing 1 changed file with 3 additions and 1 deletion.
diff --git 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;