[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 0d57382..08d80a6 100644 (file)
--- 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;