RDMA/amso1100: Prevent deadlock in destroy QP

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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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Krishna Kumar 2006-11-24 16:03:48 +05:30 • committed by Roland Dreier

parent 7013696a5f

commit c9edea298e

1 changed files with 28 additions and 8 deletions

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36

drivers/infiniband/hw/amso1100/c2_qp.c

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