From 02b01e010afeeb49328d35650d70721d2ca3fd59 Mon Sep 17 00:00:00 2001
From: Sumant Patro <sumantp@lsil.com>
Date: Wed, 14 Feb 2007 13:00:55 -0800
Subject: [PATCH] [SCSI] megaraid_sas: return sync cache call with success

FW does not support SYNCHRONIZE_CACHE cmd. FW flush cache on its own.
So, we just return success from the megasas_queue_command.

Signed-off-by: Sumant Patro <sumant.patro@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
 drivers/scsi/megaraid/megaraid_sas.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index 4070894ed5f007..01eb9b5870b5e0 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -856,6 +856,18 @@ megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
 		goto out_done;
 	}
 
+	switch (scmd->cmnd[0]) {
+	case SYNCHRONIZE_CACHE:
+		/*
+		 * FW takes care of flush cache on its own
+		 * No need to send it down
+		 */
+		scmd->result = DID_OK << 16;
+		goto out_done;
+	default:
+		break;
+	}
+
 	cmd = megasas_get_cmd(instance);
 	if (!cmd)
 		return SCSI_MLQUEUE_HOST_BUSY;