From: Bryan O'Sullivan <bos@pathscale.com>
Date: Thu, 15 Mar 2007 21:45:10 +0000 (-0700)
Subject: IB/ipath: Prevent random program use of diags interface
X-Git-Tag: v2.6.22-rc1~1126^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=490462c2686df6e35c21d1efe935e0b4a3bddb39;p=pandora-kernel.git

IB/ipath: Prevent random program use of diags interface

To prevent random utility reads and writes of the diag interface to the
chip, we first require a handshake of reading from offset 0 and writing
to offset 0 before any other reads or writes can be done through the
diags device.   Otherwise chip errors can be triggered.

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---

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