[PATCH 3/3] Phonet: do not set POLLOUT in case of send buffer overflow
From: Rémi Denis-Courmont <hidden>
Date: 2010-08-30 22:57:05
Subsystem:
networking [general], phonet protocol, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Remi Denis-Courmont, Linus Torvalds
From: Rémi Denis-Courmont <redacted> Signed-off-by: Rémi Denis-Courmont <redacted> --- 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