From: Jesse Larrew <jlarrew@redhat.com>
Date: Thu, 14 May 2009 01:00:01 -0400
Subject: [scsi] handle quiescence in progress
Message-id: 20090514045710.10947.54601.sendpatchset@squad5-lp1.lab.bos.redhat.com
O-Subject: [PATCH RHEL5.4 5/10 BZ489582] Handle quiescence in progress
Bugzilla: 489582
RH-Acked-by: Mike Christie <mchristi@redhat.com>

RHBZ#:
======
https://bugzilla.redhat.com/show_bug.cgi?id=489582

Description:
===========
This is a bug fix for all archs.

This patch adds retry logic for the NOT_READY check condition
encountered when there is a quiesce in progress (02/A1/02).

RHEL Version Found:
================
RHEL 5.3

kABI Status:
============
No symbols were harmed.

Brew:
=====
Built on all platforms.
http://brewweb.devel.redhat.com/brew/taskinfo?taskID=1794596

Upstream Status:
================
commit: af50bb993dfa673cf21ab812efe620d7e0c36319

Test Status:
============
This patch was tested by Chandra Seetharaman at IBM (
===============================================================

Jesse Larrew
IBM Onsite Partner
978-392-3183
jlarrew@redhat.com

Proposed Patch:
===============
This patch is based on 2.6.18-136.el5.

diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
index f4ae03f..af1e26a 100644
--- a/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -577,6 +577,12 @@ static int rdac_check_sense(struct scsi_device *sdev,
 			 * Just retry and wait.
 			 */
 			return SCSI_MLQUEUE_IMM_RETRY;
+		if (sense_hdr->asc == 0xA1  && sense_hdr->ascq == 0x02)
+			/* LUN Not Ready - Quiescense in progress
+			 * or has been achieved
+			 * Just retry.
+			 */
+			return SCSI_MLQUEUE_IMM_RETRY;
 		break;
 	case ILLEGAL_REQUEST:
 		if (sense_hdr->asc == 0x94 && sense_hdr->ascq == 0x01) {