From 8ba513a1fa324d87a412705d2ded64e2154e1f2a Mon Sep 17 00:00:00 2001
From: Fam Zheng <famz@redhat.com>
Date: Fri, 4 Apr 2014 05:56:00 +0200
Subject: [PATCH 05/12] iscsi: recognize "invalid field" ASCQ from WRITE SAME command

RH-Author: Fam Zheng <famz@redhat.com>
Message-id: <1396590962-25815-6-git-send-email-famz@redhat.com>
Patchwork-id: 58342
O-Subject: [RHEL-7 0day qemu-kvm PATCH 5/7] iscsi: recognize "invalid field" ASCQ from WRITE SAME command
Bugzilla: 1083413
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Markus Armbruster <armbru@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: Jeffrey Cody <jcody@redhat.com>

From: Paolo Bonzini <pbonzini@redhat.com>

Some targets may return "invalid field" as the ASCQ from WRITE SAME
if they support the command only without the UNMAP field.  Recognize
that, and return ENOTSUP just like for "invalid operation code".

Reviewed-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 27898a5daa4c6d28adb32b401a011d7198494482)
Signed-off-by: Fam Zheng <famz@redhat.com>
---
 block/iscsi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 block/iscsi.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/block/iscsi.c b/block/iscsi.c
index 4a535e3..268da2f 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1012,7 +1012,8 @@ retry:
 
     if (iTask.status == SCSI_STATUS_CHECK_CONDITION &&
         iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST &&
-        iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE) {
+        (iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE ||
+         iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB)) {
         /* WRITE SAME is not supported by the target */
         iscsilun->has_write_same = false;
         scsi_free_scsi_task(iTask.task);
-- 
1.7.1