From mboxrd@z Thu Jan 1 00:00:00 1970 From: frank.blaschka@de.ibm.com Subject: [patch 2/6] [PATCH] af_iucv: block writing if msg limit is exceeded Date: Wed, 08 Feb 2012 11:19:46 +0100 Message-ID: <20120208102029.228513931@de.ibm.com> References: <20120208101944.272235343@de.ibm.com> Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org, Ursula Braun To: davem@davemloft.net Return-path: Received: from e06smtp13.uk.ibm.com ([195.75.94.109]:51654 "EHLO e06smtp13.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756517Ab2BHKUm (ORCPT ); Wed, 8 Feb 2012 05:20:42 -0500 Received: from /spool/local by e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 8 Feb 2012 10:20:41 -0000 Content-Disposition: inline; filename=602-af_iucv-msg-limit.diff Sender: netdev-owner@vger.kernel.org List-ID: From: Ursula Braun 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 Signed-off-by: Frank Blaschka --- 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);