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scsi: devinfo: add BLIST_RETRY_ITF for EMC Symmetrix

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EMC Symmetrix returns 'internal target error' for a variety of
conditions, most of which will be transient.  So we should always retry
it, even with failfast set.  Otherwise we'd get spurious path flaps with
multipath.

Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Martin Wilck
2018-04-18 01:35:10 +02:00
committed by Martin K. Petersen
parent 358fda5ff4
commit 29cfc2ab71
3 changed files with 9 additions and 2 deletions
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4
drivers/scsi/scsi_error.c
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@@ -38,6 +38,7 @@
#include <scsi/scsi_host.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/scsi_dh.h>
#include <scsi/scsi_devinfo.h>
#include <scsi/sg.h>
#include "scsi_priv.h"
@@ -525,6 +526,9 @@ int scsi_check_sense(struct scsi_cmnd *scmd)
if (sshdr.asc == 0x10) /* DIF */
return SUCCESS;
if (sshdr.asc == 0x44 && sdev->sdev_bflags & BLIST_RETRY_ITF)
return ADD_TO_MLQUEUE;
return NEEDS_RETRY;
case NOT_READY:
case UNIT_ATTENTION: