[PATCH 07 of 10] scsi: Do not retry a request whose data integrity check failed

["Martin K. Petersen" <martin.petersen@oracle.com>]

If initiator or target reject the I/O due to DIF errors there is no
point in retrying.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

---
2 files changed, 7 insertions(+)
drivers/scsi/scsi_error.c |    3 +++
drivers/scsi/scsi_lib.c   |    4 ++++



diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -333,6 +333,9 @@ static int scsi_check_sense(struct scsi_
 		return /* soft_error */ SUCCESS;
 
 	case ABORTED_COMMAND:
+		if (sshdr.asc == 0x10) /* DIF */
+			return SUCCESS;
+
 		return NEEDS_RETRY;
 	case NOT_READY:
 	case UNIT_ATTENTION:
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -945,6 +945,10 @@ void scsi_io_completion(struct scsi_cmnd
 				scsi_requeue_command(q, cmd);
 				return;
 			} else {
+				if (sshdr.asc == 0x10) { /* DIF */
+					scsi_print_result(cmd);
+					scsi_print_sense("", cmd);
+				}
 				scsi_end_request(cmd, -EIO, this_count, 1);
 				return;
 			}