From: Ursula Braun <redacted>

When polling on an AF_IUCV socket, writing should be blocked if the
number of pending messages exceeds a defined limit.

Signed-off-by: Ursula Braun <redacted>
Signed-off-by: Frank Blaschka <redacted>
---

 net/iucv/af_iucv.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c

@@ -1490,7 +1490,7 @@ unsigned int iucv_sock_poll(struct file
 	if (sk->sk_state == IUCV_DISCONN)
 		mask |= POLLIN;
 
-	if (sock_writeable(sk))
+	if (sock_writeable(sk) && iucv_below_msglim(sk))
 		mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
 	else
 		set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);