From b6932ee35f1c1364dcea0e691b2feb912a6777e5 Mon Sep 17 00:00:00 2001
From: Steven Allen <steven.allen@purestorage.com>
Date: Fri, 24 Oct 2014 15:18:26 -0700
Subject: [PATCH] target: return CONFLICT only when SA key unmatched

PREEMPT (and PREEMPT AND ABORT) should return CONFLICT iff a specified
SERVICE ACTION RESERVATION KEY is specified and matches no existing
persistent reservation.

Without this patch, a PREEMPT will return CONFLICT if either all
reservations are held by the initiator (self preemption) or there is
nothing to preempt. According to the spec, both of these cases should
succeed.

Signed-off-by: Steven Allen <steven.allen@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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