From: Chris Boot <bootc@bootc.net>
Date: Wed, 15 Feb 2012 14:59:08 +0000 (+0000)
Subject: firewire: sbp2: Take into account Unit_Unique_ID
X-Git-Tag: v3.4-rc1~127^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8ff6a75744dfc0ea19a03c0ac5a438ef8d825342;p=pandora-kernel.git

firewire: sbp2: Take into account Unit_Unique_ID

If the target's unit directory contains a Unit_Unique_ID entry, we
should use that as the target's GUID for identification purposes. The
SBP-2 standards document says:

"Although the node unique ID (EUI-64) present in the bus information
block is sufficient to uniquely identify nodes attached to Serial Bus,
it is insufficient to identify a target when a vendor implements a
device with multiple Serial Bus node connections. In this case initiator
software requires information by which a particular target may be
uniquely identified, regardless of the Serial Bus access path used."

[ IEEE T10 P1155D Revision 4, Section 7.6 (page 51) ] and
[ IEEE T10 P1467D Revision 5, Section 7.9 (page 74) ]

Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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