1 files changed, 29 insertions, 21 deletions

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 96e7e3eaca29..8b89fab7c420 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -581,16 +581,36 @@ static bool scsi_end_request(struct request *req, blk_status_t error,
 	return false;
 }
 
+static inline u8 get_scsi_ml_byte(int result)
+{
+	return (result >> 8) & 0xff;
+}
+
 /**
  * scsi_result_to_blk_status - translate a SCSI result code into blk_status_t
- * @cmd:	SCSI command
  * @result:	scsi error code
  *
- * Translate a SCSI result code into a blk_status_t value. May reset the host
- * byte of @cmd->result.
+ * Translate a SCSI result code into a blk_status_t value.
  */
-static blk_status_t scsi_result_to_blk_status(struct scsi_cmnd *cmd, int result)
+static blk_status_t scsi_result_to_blk_status(int result)
 {
+	/*
+	 * Check the scsi-ml byte first in case we converted a host or status
+	 * byte.
+	 */
+	switch (get_scsi_ml_byte(result)) {
+	case SCSIML_STAT_OK:
+		break;
+	case SCSIML_STAT_RESV_CONFLICT:
+		return BLK_STS_NEXUS;
+	case SCSIML_STAT_NOSPC:
+		return BLK_STS_NOSPC;
+	case SCSIML_STAT_MED_ERROR:
+		return BLK_STS_MEDIUM;
+	case SCSIML_STAT_TGT_FAILURE:
+		return BLK_STS_TARGET;
+	}
+
 	switch (host_byte(result)) {
 	case DID_OK:
 		if (scsi_status_is_good(result))
@@ -599,18 +619,6 @@ static blk_status_t scsi_result_to_blk_status(struct scsi_cmnd *cmd, int result)
 	case DID_TRANSPORT_FAILFAST:
 	case DID_TRANSPORT_MARGINAL:
 		return BLK_STS_TRANSPORT;
-	case DID_TARGET_FAILURE:
-		set_host_byte(cmd, DID_OK);
-		return BLK_STS_TARGET;
-	case DID_NEXUS_FAILURE:
-		set_host_byte(cmd, DID_OK);
-		return BLK_STS_NEXUS;
-	case DID_ALLOC_FAILURE:
-		set_host_byte(cmd, DID_OK);
-		return BLK_STS_NOSPC;
-	case DID_MEDIUM_ERROR:
-		set_host_byte(cmd, DID_OK);
-		return BLK_STS_MEDIUM;
 	default:
 		return BLK_STS_IOERR;
 	}
@@ -697,7 +705,7 @@ static void scsi_io_completion_action(struct scsi_cmnd *cmd, int result)
 	if (sense_valid)
 		sense_current = !scsi_sense_is_deferred(&sshdr);
 
-	blk_stat = scsi_result_to_blk_status(cmd, result);
+	blk_stat = scsi_result_to_blk_status(result);
 
 	if (host_byte(result) == DID_RESET) {
 		/* Third party bus reset or reset for error recovery
@@ -878,14 +886,14 @@ static int scsi_io_completion_nz_result(struct scsi_cmnd *cmd, int result,
 					     SCSI_SENSE_BUFFERSIZE);
 		}
 		if (sense_current)
-			*blk_statp = scsi_result_to_blk_status(cmd, result);
+			*blk_statp = scsi_result_to_blk_status(result);
 	} else if (blk_rq_bytes(req) == 0 && sense_current) {
 		/*
 		 * Flush commands do not transfers any data, and thus cannot use
 		 * good_bytes != blk_rq_bytes(req) as the signal for an error.
 		 * This sets *blk_statp explicitly for the problem case.
 		 */
-		*blk_statp = scsi_result_to_blk_status(cmd, result);
+		*blk_statp = scsi_result_to_blk_status(result);
 	}
 	/*
 	 * Recovered errors need reporting, but they're always treated as
@@ -1856,13 +1864,13 @@ static int scsi_init_hctx(struct blk_mq_hw_ctx *hctx, void *data,
 	return 0;
 }
 
-static int scsi_map_queues(struct blk_mq_tag_set *set)
+static void scsi_map_queues(struct blk_mq_tag_set *set)
 {
 	struct Scsi_Host *shost = container_of(set, struct Scsi_Host, tag_set);
 
 	if (shost->hostt->map_queues)
 		return shost->hostt->map_queues(shost);
-	return blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]);
+	blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]);
 }
 
 void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)