From: Roland Dreier <rolandd@cisco.com>
Date: Sun, 18 Jun 2006 03:37:41 +0000 (-0700)
Subject: IB/mthca: Make all device methods truly reentrant
X-Git-Tag: v2.6.18-rc1~1110^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c93b6fbaa99bb3a1552e14317296be14dde51dfb;p=pandora-kernel.git

IB/mthca: Make all device methods truly reentrant

Documentation/infiniband/core_locking.txt says:

  All of the methods in struct ib_device exported by a low-level
  driver must be fully reentrant.  The low-level driver is required to
  perform all synchronization necessary to maintain consistency, even
  if multiple function calls using the same object are run
  simultaneously.

However, mthca's modify_qp, modify_srq and resize_cq methods are
currently not reentrant.  Add a mutex to the QP, SRQ and CQ structures
so that these calls can be properly serialized.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
---

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