[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>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index 4070894ed5f0..01eb9b5870b5 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;