From: Bart Van Assche <bvanassche@acm.org>
Date: Fri, 22 Jun 2012 08:49:38 +0000 (+0000)
Subject: [SCSI] scsi_dh_alua: Re-enable STPG for unavailable ports
X-Git-Tag: v3.6-rc1~103^2~62
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=bb2c94a3a6ad37fe7d34f369295bcdf5387e264f;p=linux.git

[SCSI] scsi_dh_alua: Re-enable STPG for unavailable ports

A quote from SPC-4: "While in the unavailable primary target port
asymmetric access state, the device server shall support those of
the following commands that it supports while in the active/optimized
state: [ ... ] d) SET TARGET PORT GROUPS; [ ... ]". Hence re-enable
sending STPG to a target port group that is in the unavailable state.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Babu Moger <babu.moger@netapp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---

diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
index 0d573822bf43..08d80a6d272a 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -742,9 +742,9 @@ static int alua_activate(struct scsi_device *sdev,
 				stpg = 0;
 			break;
 		case TPGS_STATE_STANDBY:
+		case TPGS_STATE_UNAVAILABLE:
 			stpg = 1;
 			break;
-		case TPGS_STATE_UNAVAILABLE:
 		case TPGS_STATE_OFFLINE:
 			err = SCSI_DH_IO;
 			break;