scsi: core: Make scsi_result_to_blk_status() recognize CONDITION MET

Ensure that CONDITION MET and other non-zero status values that indicate
success are translated into BLK_STS_OK.

Signed-off-by: Bart Van Assche <[email protected]>
Cc: Hannes Reinecke <[email protected]>
Cc: Douglas Gilbert <[email protected]>
Cc: Damien Le Moal <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Lee Duncan <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: KAGA-KOKO

drivers/scsi/scsi_lib.c

@@ -733,6 +733,15 @@ static bool scsi_end_request(struct request *req, blk_status_t error,
 static blk_status_t scsi_result_to_blk_status(struct scsi_cmnd *cmd, int result)
 {
 	switch (host_byte(result)) {
+	case DID_OK:
+		/*
+		 * Also check the other bytes than the status byte in result
+		 * to handle the case when a SCSI LLD sets result to
+		 * DRIVER_SENSE << 24 without setting SAM_STAT_CHECK_CONDITION.
+		 */
+		if (scsi_status_is_good(result) && (result & ~0xff) == 0)
+			return BLK_STS_OK;
+		return BLK_STS_IOERR;
 	case DID_TRANSPORT_FAILFAST:
 		return BLK_STS_TRANSPORT;
 	case DID_TARGET_FAILURE: