[SCSI] scsi_dh: make check_sense return ADD_TO_MLQUEUE

Change scsi_dh check_sense functions to return ADD_TO_MLQUEUE
to allow retries to occur without restriction of blk_noretry_request
check.
Signed-off-by: Mike Anderson <andmike@linux.vnet.ibm.com>
Acked-by: Chandra Seetharaman <sekharan@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/device_handler/scsi_dh_alua.c

@@ -425,7 +425,7 @@ static int alua_check_sense(struct scsi_device *sdev,
 			/*
 			 * LUN Not Accessible - ALUA state transition
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x0b)
 			/*
 			 * LUN Not Accessible -- Target port in standby state
@@ -447,18 +447,18 @@ static int alua_check_sense(struct scsi_device *sdev,
 			/*
 			 * Power On, Reset, or Bus Device Reset, just retry.
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		if (sense_hdr->asc == 0x2a && sense_hdr->ascq == 0x06) {
 			/*
 			 * ALUA state changed
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		}
 		if (sense_hdr->asc == 0x2a && sense_hdr->ascq == 0x07) {
 			/*
 			 * Implicit ALUA state transition failed
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		}
 		break;
 	}
@@ -490,7 +490,7 @@ static int alua_stpg(struct scsi_device *sdev, int state,
 		if (!err)
 			return SCSI_DH_IO;
 		err = alua_check_sense(sdev, &sense_hdr);
-		if (retry > 0 && err == NEEDS_RETRY) {
+		if (retry > 0 && err == ADD_TO_MLQUEUE) {
 			retry--;
 			goto retry;
 		}
@@ -535,7 +535,7 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h)
 			return SCSI_DH_IO;
 
 		err = alua_check_sense(sdev, &sense_hdr);
-		if (err == NEEDS_RETRY)
+		if (err == ADD_TO_MLQUEUE)
 			goto retry;
 		sdev_printk(KERN_INFO, sdev,
 			    "%s: rtpg sense code %02x/%02x/%02x\n",

drivers/scsi/device_handler/scsi_dh_emc.c

@@ -439,7 +439,7 @@ static int clariion_check_sense(struct scsi_device *sdev,
 			 * Unit Attention Code. This is the first IO
 			 * to the new path, so just retry.
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		break;
 	}
 
@@ -514,7 +514,7 @@ retry:
 			return SCSI_DH_IO;
 
 		err = clariion_check_sense(sdev, &sshdr);
-		if (retry > 0 && err == NEEDS_RETRY) {
+		if (retry > 0 && err == ADD_TO_MLQUEUE) {
 			retry--;
 			goto retry;
 		}

drivers/scsi/device_handler/scsi_dh_rdac.c

@@ -551,7 +551,7 @@ static int rdac_check_sense(struct scsi_device *sdev,
 			 *
 			 * Just retry and wait.
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		break;
 	case ILLEGAL_REQUEST:
 		if (sense_hdr->asc == 0x94 && sense_hdr->ascq == 0x01) {
@@ -568,7 +568,7 @@ static int rdac_check_sense(struct scsi_device *sdev,
 			/*
 			 * Power On, Reset, or Bus Device Reset, just retry.
 			 */
-			return NEEDS_RETRY;
+			return ADD_TO_MLQUEUE;
 		break;
 	}
 	/* success just means we do not care what scsi-ml does */