scsi: xen: Drop use of internal host codes
The error codes:
- DID_TARGET_FAILURE
- DID_NEXUS_FAILURE
- DID_ALLOC_FAILURE
- DID_MEDIUM_ERROR
are internal to the SCSI layer. Drivers must not use them because:
1. They are not propagated upwards, so SG IO/passthrough users will not
see an error and think a command was successful.
xen-scsiback will never see this error and should not try to send it.
2. There is no handling for them in scsi_decide_disposition() so if
xen-scsifront were to return the error to the SCSI midlayer then it
kicks off the error handler which is definitely not what we want.
Remove the use from xen-scsifront/back.
Link: https://lore.kernel.org/r/20220812010027.8251-2-michael.christie@oracle.com
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
index 51afc66..66b316d 100644
--- a/drivers/scsi/xen-scsifront.c
+++ b/drivers/scsi/xen-scsifront.c
@@ -289,14 +289,6 @@ static unsigned int scsifront_host_byte(int32_t rslt)
return DID_TRANSPORT_DISRUPTED;
case XEN_VSCSIIF_RSLT_HOST_TRANSPORT_FAILFAST:
return DID_TRANSPORT_FAILFAST;
- case XEN_VSCSIIF_RSLT_HOST_TARGET_FAILURE:
- return DID_TARGET_FAILURE;
- case XEN_VSCSIIF_RSLT_HOST_NEXUS_FAILURE:
- return DID_NEXUS_FAILURE;
- case XEN_VSCSIIF_RSLT_HOST_ALLOC_FAILURE:
- return DID_ALLOC_FAILURE;
- case XEN_VSCSIIF_RSLT_HOST_MEDIUM_ERROR:
- return DID_MEDIUM_ERROR;
case XEN_VSCSIIF_RSLT_HOST_TRANSPORT_MARGINAL:
return DID_TRANSPORT_MARGINAL;
default:
diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
index 7a0c93a..e98c88a 100644
--- a/drivers/xen/xen-scsiback.c
+++ b/drivers/xen/xen-scsiback.c
@@ -333,18 +333,6 @@ static int32_t scsiback_result(int32_t result)
case DID_TRANSPORT_FAILFAST:
host_status = XEN_VSCSIIF_RSLT_HOST_TRANSPORT_FAILFAST;
break;
- case DID_TARGET_FAILURE:
- host_status = XEN_VSCSIIF_RSLT_HOST_TARGET_FAILURE;
- break;
- case DID_NEXUS_FAILURE:
- host_status = XEN_VSCSIIF_RSLT_HOST_NEXUS_FAILURE;
- break;
- case DID_ALLOC_FAILURE:
- host_status = XEN_VSCSIIF_RSLT_HOST_ALLOC_FAILURE;
- break;
- case DID_MEDIUM_ERROR:
- host_status = XEN_VSCSIIF_RSLT_HOST_MEDIUM_ERROR;
- break;
case DID_TRANSPORT_MARGINAL:
host_status = XEN_VSCSIIF_RSLT_HOST_TRANSPORT_MARGINAL;
break;
