linux-kernel - [PATCH 5/6] scsi: megaraid_sas - return sync cache call with success

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Date:	Wed, 14 Feb 2007 13:00:55 -0800
From:	Sumant Patro <sumantp@...l.com>
To:	James.Bottomley@...elEye.com, akpm@...l.org
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	neela.kolli@....com, bo.yang@....com, sumant.patro@....com
Subject: [PATCH 5/6] 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@....com>
---

 drivers/scsi/megaraid/megaraid_sas.c |   12 ++++++++++++
 1 files changed, 12 insertions(+)

diff -uprN linux-feb13-new-p4/drivers/scsi/megaraid/megaraid_sas.c linux-feb13-new-p5/drivers/scsi/megaraid/megaraid_sas.c
--- linux-feb13-new-p4/drivers/scsi/megaraid/megaraid_sas.c	2007-02-14 04:34:31.000000000 -0800
+++ linux-feb13-new-p5/drivers/scsi/megaraid/megaraid_sas.c	2007-02-14 05:19:30.000000000 -0800
@@ -857,6 +857,18 @@ megasas_queue_command(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;
+	}
+
 	/* Check if we can accept cmds */
 	if (instance->is_busy) {
 		sec = (jiffies - instance->last_time) / HZ;


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