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From 4dfa4b8a0adf2ff3b5f48426e5f293d4ccaa86ce Mon Sep 17 00:00:00 2001
From: Fam Zheng <famz@redhat.com>
Date: Wed, 29 Jan 2014 05:09:21 +0100
Subject: [PATCH 03/28] scsi: Support TEST UNIT READY in the dummy LUN0

RH-Author: Fam Zheng <famz@redhat.com>
Message-id: <1390972161-27425-1-git-send-email-famz@redhat.com>
Patchwork-id: 57014
O-Subject: [RHEL-7 qemu-kvm PATCH] scsi: Support TEST UNIT READY in the dummy LUN0
Bugzilla: 1004143
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Markus Armbruster <armbru@redhat.com>

From: Paolo Bonzini <pbonzini@redhat.com>

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1004143
Brew:     http://brewweb.devel.redhat.com/brew/taskinfo?taskID=6965573

SeaBIOS waits for LUN0 to respond to the TEST UNIT READY command
in order to decide whether it should part of the boot sequence.
If LUN0 does not respond to the command, boot is delayed by up
to 5 seconds.  This currently happens when there is no LUN0 on
a target.  Fix that by adding a trivial implementation of the
command.

Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 1cb27d9233d572826b45bd8498d2fab1b6f01df9)
Signed-off-by: Fam Zheng <famz@redhat.com>
---
 hw/scsi/scsi-bus.c | 2 ++
 1 file changed, 2 insertions(+)

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 hw/scsi/scsi-bus.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index 0f02208..a0fbf06 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -461,6 +461,8 @@ static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf)
             r->req.dev->sense_is_ua = false;
         }
         break;
+    case TEST_UNIT_READY:
+        break;
     default:
         scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED));
         scsi_req_complete(req, CHECK_CONDITION);
-- 
1.7.1