[PATCH v3 14/40] scsi: device_handlers: rdac: use 16-bits defined sense codes

[Damien Le Moal <dlemoal@kernel.org>]

Refactor the NetApp E-Series RDAC SCSI device handler driver to use the
16-bits sense_code field of struct scsi_sense_hdr and struct scsi_failure
and replace all hard-coded additional sense codes and additional sense
code qualifiers with the enum values defined in include/scsi/scsi_sense.h.
This helps with code clarity as the sense codes being processed are easier
to test and self-documented.

No functional change intended.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
---
 drivers/scsi/device_handler/scsi_dh_rdac.c | 45 ++++++++++------------
 1 file changed, 21 insertions(+), 24 deletions(-)

diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
index 75c9cc291e38..742534c99386 100644
--- a/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -493,7 +493,8 @@ static int mode_select_handle_sense(struct scsi_device *sdev,
 	RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, "
 		"MODE_SELECT returned with sense %02x/%02x/%02x",
 		(char *) h->ctlr->array_name, h->ctlr->index,
-		sense_hdr->sense_key, sense_hdr->asc, sense_hdr->ascq);
+		 sense_hdr->sense_key, scsi_sense_asc(sense_hdr),
+		 scsi_sense_ascq(sense_hdr));
 
 	return SCSI_DH_IO;
 }
@@ -515,34 +516,28 @@ static void send_mode_select(struct work_struct *work)
 	struct scsi_failure failure_defs[] = {
 		{
 			.sense_key = NO_SENSE,
-			.asc = SCMD_FAILURE_ASC_ANY,
-			.ascq = SCMD_FAILURE_ASCQ_ANY,
+			.sense_code = SCMD_FAILURE_SENSE_CODE_ANY,
 			.result = SAM_STAT_CHECK_CONDITION,
 		},
 		{
 			.sense_key = ABORTED_COMMAND,
-			.asc = SCMD_FAILURE_ASC_ANY,
-			.ascq = SCMD_FAILURE_ASCQ_ANY,
+			.sense_code = SCMD_FAILURE_SENSE_CODE_ANY,
 			.result = SAM_STAT_CHECK_CONDITION,
 		},
 		{
 			.sense_key = UNIT_ATTENTION,
-			.asc = SCMD_FAILURE_ASC_ANY,
-			.ascq = SCMD_FAILURE_ASCQ_ANY,
+			.sense_code = SCMD_FAILURE_SENSE_CODE_ANY,
 			.result = SAM_STAT_CHECK_CONDITION,
 		},
-		/* LUN Not Ready and is in the Process of Becoming Ready */
 		{
 			.sense_key = NOT_READY,
-			.asc = 0x04,
-			.ascq = 0x01,
+			.sense_code = LU_IS_IN_PROCESS_OF_BECOMING_READY,
 			.result = SAM_STAT_CHECK_CONDITION,
 		},
-		/* Command Lock contention */
+		/* Command Lock contention (not a standard sense code) */
 		{
 			.sense_key = ILLEGAL_REQUEST,
-			.asc = 0x91,
-			.ascq = 0x36,
+			.sense_code = scsi_sense_code(0x91, 0x36),
 			.allowed = SCMD_FAILURE_NO_LIMIT,
 			.result = SAM_STAT_CHECK_CONDITION,
 		},
@@ -674,33 +669,34 @@ static enum scsi_disposition rdac_check_sense(struct scsi_device *sdev,
 {
 	struct rdac_dh_data *h = sdev->handler_data;
 
-	RDAC_LOG(RDAC_LOG_SENSE, sdev, "array %s, ctlr %d, "
-			"I/O returned with sense %02x/%02x/%02x",
-			(char *) h->ctlr->array_name, h->ctlr->index,
-			sense_hdr->sense_key, sense_hdr->asc, sense_hdr->ascq);
+	RDAC_LOG(RDAC_LOG_SENSE, sdev,
+		 "array %s, ctlr %d, I/O returned with sense %02x/%02x/%02x",
+		 (char *) h->ctlr->array_name, h->ctlr->index,
+		 sense_hdr->sense_key, scsi_sense_asc(sense_hdr),
+		 scsi_sense_ascq(sense_hdr));
 
 	switch (sense_hdr->sense_key) {
 	case NOT_READY:
-		if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x01)
+		if (sense_hdr->sense_code == LU_IS_IN_PROCESS_OF_BECOMING_READY)
 			/* LUN Not Ready - Logical Unit Not Ready and is in
 			* the process of becoming ready
 			* Just retry.
 			*/
 			return ADD_TO_MLQUEUE;
-		if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x81)
+		if (sense_hdr->sense_code == scsi_sense_code(0x04, 0x81))
 			/* LUN Not Ready - Storage firmware incompatible
 			 * Manual code synchonisation required.
 			 *
 			 * Nothing we can do here. Try to bypass the path.
 			 */
 			return SUCCESS;
-		if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0xA1)
+		if (sense_hdr->sense_code == scsi_sense_code(0x04, 0xA1))
 			/* LUN Not Ready - Quiescense in progress
 			 *
 			 * Just retry and wait.
 			 */
 			return ADD_TO_MLQUEUE;
-		if (sense_hdr->asc == 0xA1  && sense_hdr->ascq == 0x02)
+		if (sense_hdr->sense_code == scsi_sense_code(0xA1, 0x02))
 			/* LUN Not Ready - Quiescense in progress
 			 * or has been achieved
 			 * Just retry.
@@ -708,7 +704,7 @@ static enum scsi_disposition rdac_check_sense(struct scsi_device *sdev,
 			return ADD_TO_MLQUEUE;
 		break;
 	case ILLEGAL_REQUEST:
-		if (sense_hdr->asc == 0x94 && sense_hdr->ascq == 0x01) {
+		if (sense_hdr->sense_code == scsi_sense_code(0x94, 0x01)) {
 			/* Invalid Request - Current Logical Unit Ownership.
 			 * Controller is not the current owner of the LUN,
 			 * Fail the path, so that the other path be used.
@@ -718,12 +714,13 @@ static enum scsi_disposition rdac_check_sense(struct scsi_device *sdev,
 		}
 		break;
 	case UNIT_ATTENTION:
-		if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00)
+		if (sense_hdr->sense_code ==
+		    POWER_ON_RESET_OR_BUS_DEVICE_RESET_OCCURRED)
 			/*
 			 * Power On, Reset, or Bus Device Reset, just retry.
 			 */
 			return ADD_TO_MLQUEUE;
-		if (sense_hdr->asc == 0x8b && sense_hdr->ascq == 0x02)
+		if (sense_hdr->sense_code == scsi_sense_code(0x8b, 0x02))
 			/*
 			 * Quiescence in progress , just retry.
 			 */
-- 
2.55.0