From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Fri, 22 Apr 2011 10:21:44 +0000 (+0200)
Subject: firewire: sbp2: omit Scsi_Host lock from queuecommand
X-Git-Tag: v3.0-rc1~368^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b75ca5ea8e439893121ad80406a3c04c4b7612ab;p=pandora-kernel.git

firewire: sbp2: omit Scsi_Host lock from queuecommand

firewire-sbp2 already takes care for internal serialization where
required (ORB list accesses), and it does not use cmd->serial_number
internally.  Hence it is safe to not grab the shost lock around
queuecommand.

While we are at housekeeping, drop a redundant struct member:
sbp2_command_orb.done is set once in a hot path and dereferenced once in
a hot path.  We can as well dereference sbp2_command_orb.cmd->scsi_done
instead.

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