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RDMA/amso1100: Prevent deadlock in destroy QP
authorKrishna Kumar <krkumar2@in.ibm.com>
Fri, 24 Nov 2006 10:33:48 +0000 (16:03 +0530)
committerRoland Dreier <rolandd@cisco.com>
Wed, 29 Nov 2006 23:33:08 +0000 (15:33 -0800)
commitc9edea298e52faeb0d4ae875cb712a5d69ba1966
tree9f89af31110b7ad8acce86fabb10c98005dedb75tree | snapshot
parent7013696a5f5ccd0d847d5e8b841d0b0b312277c8commit | diff
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>
drivers/infiniband/hw/amso1100/c2_qp.c diff | blob | history
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