From: Krishna Kumar <krkumar2@in.ibm.com>
Date: Fri, 24 Nov 2006 10:33:48 +0000 (+0530)
Subject: RDMA/amso1100: Prevent deadlock in destroy QP
X-Git-Tag: v2.6.20-rc1~34^2~40^2~471^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c9edea298e52faeb0d4ae875cb712a5d69ba1966;p=pandora-kernel.git

RDMA/amso1100: Prevent deadlock in destroy QP

It is possible to swap the CQs used for send_cq and recv_cq when
creating two different QPs.  If these two QPs are then destroyed at
the same time, an AB-BA deadlock can occur because the CQ locks are
taken our of order.  Fix this by always taking CQ locks in a fixed
order.

Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
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