From: Hannes Reinecke <hare@suse.de>
Subject: Retry ALUA device handler initialization on Unit Attention

Whenever we receive a UNIT ATTENTION sense code we should just retry
the command. We only should take care to pass through 04/02 as this
is handled later on by the generic code in scsi_check_sense().

Signed-off-by: Hannes Reinecke <hare@suse.de>

diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
index e356b43..a3660a6 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -444,24 +444,16 @@ static int alua_check_sense(struct scsi_device *sdev,
 			return SUCCESS;
 		break;
 	case UNIT_ATTENTION:
-		if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00)
-			/*
-			 * Power On, Reset, or Bus Device Reset, just retry.
-			 */
-			return ADD_TO_MLQUEUE;
-		if (sense_hdr->asc == 0x2a && sense_hdr->ascq == 0x06) {
-			/*
-			 * ALUA state changed
-			 */
-			return ADD_TO_MLQUEUE;
-		}
-		if (sense_hdr->asc == 0x2a && sense_hdr->ascq == 0x07) {
-			/*
-			 * Implicit ALUA state transition failed
-			 */
-			return ADD_TO_MLQUEUE;
-		}
-		break;
+		if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x02)
+			/*
+			 * LUN not ready, initialization command required
+			 */
+			return SCSI_RETURN_NOT_HANDLED;
+
+		/*
+		 * Just retry for UNIT_ATTENTION
+		 */
+		return ADD_TO_MLQUEUE;
 	}
 
 	return SCSI_RETURN_NOT_HANDLED;