From 882e3f8e6966109ad837cfe79e97cf3deb3ae19b Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@suse.de>
Date: Mon, 4 Mar 2013 14:08:06 +0100
Subject: [PATCH] target_core_sbc: use noop for SYNCHRONIZE_CACHE

Windows does not expect SYNCHRONIZE_CACHE to be not supported,
and will generate a BSOD upon shutdown when using rd_mcp backend.
So better use a noop here.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
---
 drivers/target/target_core_sbc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 290230de2c53..60d4b5185f32 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -464,8 +464,11 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 		break;
 	case SYNCHRONIZE_CACHE:
 	case SYNCHRONIZE_CACHE_16:
-		if (!ops->execute_sync_cache)
-			return TCM_UNSUPPORTED_SCSI_OPCODE;
+		if (!ops->execute_sync_cache) {
+			size = 0;
+			cmd->execute_cmd = sbc_emulate_noop;
+			break;
+		}
 
 		/*
 		 * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE
-- 
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