[SCSI] Do not retry a request whose data integrity check failed

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>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

2 files changed, 10 insertions, 2 deletions

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index a69397fd314a..fc4b2d05f2e1 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -344,6 +344,9 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
                 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
index a47c05d7829a..a20730c48020 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -950,9 +950,14 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
                                  * 6-byte command.
                                  */
                                 scsi_requeue_command(q, cmd);
-                                return;
-                        } else {
+                        } else if (sshdr.asc == 0x10) /* DIX */
+                                scsi_end_request(cmd, -EIO, this_count, 0);
+                        else
                                 scsi_end_request(cmd, -EIO, this_count, 1);
+                        return;
+                case ABORTED_COMMAND:
+                        if (sshdr.asc == 0x10) { /* DIF */
+                                scsi_end_request(cmd, -EIO, this_count, 0);
                                 return;
                         }
                         break;