On Fujitsu ETERNUS systems, sense code ABORTED COMMAND with ASC/Q C1/01
is used to indicate temporary condition where the storage-internal path
to a target is switched from one controller to another. SCSI commands
that return with this error code must be retried unconditionally (i.e. without
the "maybe_retry" logic in scsi_decide_disposition); otherwise dm-multipath
might initiate a failover from a healthy path e.g. for REQ_FAILFAST_DEV
commands.
Signed-off-by: Martin Wilck <mwilck@xxxxxxxx>
---
drivers/scsi/scsi_error.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index d042915ce895..598111a741d4 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -518,6 +518,16 @@ int scsi_check_sense(struct scsi_cmnd *scmd)
if (sshdr.asc == 0x10) /* DIF */
return SUCCESS;
+ if (!strncmp(scmd->device->vendor, "FUJITSU", 7) &&
+ !strncmp(scmd->device->model, "ETERNUS_DXM", 11) &&
+ (sshdr.asc == 0xc1) && (sshdr.ascq == 0x1)) {
+ /*
+ * Fujitsu Eternus uses this vendor specific code
+ * to indicate an internal reconfiguration status
+ * which can be recovered with a retry.
+ */
+ return ADD_TO_MLQUEUE;
+ }
return NEEDS_RETRY;
case NOT_READY:
case UNIT_ATTENTION:
--
2.15.1
