[PATCH 2/2] scsi: TUR path is down after adapter gets reset in multipath configuration(scsi_dh_alus.c)

[wenxiong@linux.vnet.ibm.com]

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This patch also fixes the 02/04/02 K/C/Q check in alua_check_sense
handler.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Teste-by: Wen Xiong <wenxiong@linux.vnet.ibm.com>
---
 drivers/scsi/device_handler/scsi_dh_alua.c |    7 +++++++
 1 file changed, 7 insertions(+)

Index: b/drivers/scsi/device_handler/scsi_dh_alua.c
===================================================================
--- a/drivers/scsi/device_handler/scsi_dh_alua.c	2014-10-23 13:00:45.000000000 -0500
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c	2014-10-23 13:04:16.152079004 -0500
@@ -474,6 +474,13 @@ static int alua_check_sense(struct scsi_
 			 * LUN Not Ready -- Offline
 			 */
 			return SUCCESS;
+		if (sdev->allow_restart &&
+		    (sense_hdr->asc == 0x04) && (sense_hdr->ascq == 0x02))
+			/*
+			 * if the device is not started, we need to wake
+			 * the error handler to start the motor
+			 */
+			return FAILED;
 		break;
 	case UNIT_ATTENTION:
 		if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00)

--