From: Tom Tucker <tom@opengridcomputing.com>
Date: Tue, 11 Mar 2008 18:31:39 +0000 (-0400)
Subject: SVCRDMA: Add xprt refs to fix close/unmount crash
X-Git-Tag: v2.6.25-rc6~37
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c48cbb405c4f338ce3263c44d621eff41d9a95fc;p=pandora-kernel.git

SVCRDMA: Add xprt refs to fix close/unmount crash

RDMA connection shutdown on an SMP machine can cause a kernel crash due
to the transport close path racing with the I/O tasklet.

Additional transport references were added as follows:
- A reference when on the DTO Q to avoid having the transport
  deleted while queued for I/O.
- A reference while there is a QP able to generate events.
- A reference until the DISCONNECTED event is received on the CM ID

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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