From: Ursula Braun <ursula.braun@de.ibm.com>
Date: Mon, 21 Jul 2014 10:54:44 +0000 (+0200)
Subject: af_iucv: avoid path quiesce of severed path in shutdown()
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~149^2~114
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1042cab8627a2d11491e8b0dd40c4dda3180285a;p=pandora-kernel.git

af_iucv: avoid path quiesce of severed path in shutdown()

An af_iucv stress test showed -EPIPE results for sendmsg()
calls. They are caused by quiescing a path even though it has
been already severed by peer. For IUCV transport shutdown()
consists of 2 steps:
(1) sending the shutdown message to peer
(2) quiescing the iucv path
If the iucv path between these 2 steps is severed due to peer
closing the path, the quiesce step is no longer needed.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <blaschka@linux.vnet.ibm.com>
Reported-by: Philipp Hachtmann <phacht@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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