netdev - [PATCH 3/3] Phonet: do not set POLLOUT in case of send buffer overflow

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Date:	Tue, 31 Aug 2010 01:57:05 +0300
From:	Rémi Denis-Courmont 
	<remi.denis-courmont@...ia.com>
To:	netdev@...r.kernel.org
Subject: [PATCH 3/3] Phonet: do not set POLLOUT in case of send buffer overflow

From: Rémi Denis-Courmont <remi.denis-courmont@...ia.com>

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@...ia.com>
---
 net/phonet/socket.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/net/phonet/socket.c b/net/phonet/socket.c
index 6e9848b..7c91f73 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;
-- 
1.7.0.4

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