scsi: xen-scsifront: Compability status handling

The Xen guest might run against arbitrary backends, so the driver might
receive a status with driver_byte set. Map these errors to DID_ERROR to be
consistent with recent changes.

Link: https://lore.kernel.org/r/20210427083046.31620-14-hare@suse.deSigned-off-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/xen-scsifront.c

@@ -251,6 +251,7 @@ static void scsifront_cdb_cmd_done(struct vscsifrnt_info *info,
 	struct scsi_cmnd *sc;
 	uint32_t id;
 	uint8_t sense_len;
+	int result;
 
 	id = ring_rsp->rqid;
 	shadow = info->shadow[id];
@@ -261,7 +262,12 @@ static void scsifront_cdb_cmd_done(struct vscsifrnt_info *info,
 	scsifront_gnttab_done(info, shadow);
 	scsifront_put_rqid(info, id);
 
-	sc->result = ring_rsp->rslt;
+	result = ring_rsp->rslt;
+	if (result >> 24)
+		set_host_byte(sc, DID_ERROR);
+	else
+		set_host_byte(sc, host_byte(result));
+	set_status_byte(sc, result & 0xff);
 	scsi_set_resid(sc, ring_rsp->residual_len);
 
 	sense_len = min_t(uint8_t, VSCSIIF_SENSE_BUFFERSIZE,