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From 496cf1296786c104f08a04263d59abf701759374 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon, 20 Jan 2014 12:49:44 +0100
Subject: [PATCH 28/34] scsi-bus: fix transfer length and direction for VERIFY command
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RH-Author: Paolo Bonzini <pbonzini@redhat.com>
Message-id: <1390222185-24969-2-git-send-email-pbonzini@redhat.com>
Patchwork-id: 56833
O-Subject: [RHEL 7.0 qemu-kvm PATCH 1/2] scsi-bus: fix transfer length and direction for VERIFY command
Bugzilla: 1035644
RH-Acked-by: Fam Zheng <famz@redhat.com>
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
RH-Acked-by: Orit Wasserman <owasserm@redhat.com>

The amount of bytes to transfer depends on the BYTCHK field.
If any data is transferred, it is sent to the device.

Cc: qemu-stable@nongnu.org
Tested-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit d12ad44cc4cc9142179e64295608611f118b8ad8)
---
 hw/scsi/scsi-bus.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 hw/scsi/scsi-bus.c |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index 6733c1a..0f02208 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -874,7 +874,6 @@ static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
     case RELEASE:
     case ERASE:
     case ALLOW_MEDIUM_REMOVAL:
-    case VERIFY_10:
     case SEEK_10:
     case SYNCHRONIZE_CACHE:
     case SYNCHRONIZE_CACHE_16:
@@ -891,6 +890,16 @@ static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
     case ALLOW_OVERWRITE:
         cmd->xfer = 0;
         break;
+    case VERIFY_10:
+    case VERIFY_12:
+    case VERIFY_16:
+        if ((buf[1] & 2) == 0) {
+            cmd->xfer = 0;
+        } else if ((buf[1] & 4) == 1) {
+            cmd->xfer = 1;
+        }
+        cmd->xfer *= dev->blocksize;
+        break;
     case MODE_SENSE:
         break;
     case WRITE_SAME_10:
@@ -1088,6 +1097,9 @@ static void scsi_cmd_xfer_mode(SCSICommand *cmd)
     case WRITE_VERIFY_12:
     case WRITE_16:
     case WRITE_VERIFY_16:
+    case VERIFY_10:
+    case VERIFY_12:
+    case VERIFY_16:
     case COPY:
     case COPY_VERIFY:
     case COMPARE:
-- 
1.7.1