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

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Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Rémi Denis-Courmont 2010-08-30 12:57:05 +00:00 committed by David S. Miller
parent 02ac3268a5
commit 01b38606bd
1 changed files with 3 additions and 1 deletions
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4
net/phonet/socket.c
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@ -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;