From d0a91295557666f9e58b79b5177a98229007803b Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@linux-iscsi.org>
Date: Sat, 14 Feb 2015 01:56:19 +0000
Subject: [PATCH] target: Fail WRITE_SAME w/ UNMAP=1 when emulate_tpws=0

This patch adds a check within sbc_setup_write_same() to fail a
WRITE_SAME w/ UNMAP=1 op, if the backend device has emulate_tpws
disabled.

Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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