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@xxxxxxxx>
---
drivers/scsi/scsi_devinfo.c | 3 ++-
drivers/scsi/scsi_error.c | 4 ++++
include/scsi/scsi_devinfo.h | 4 +++-
3 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c
index c05843a..f7b94c1 100644
--- a/drivers/scsi/scsi_devinfo.c
+++ b/drivers/scsi/scsi_devinfo.c
@@ -161,7 +161,8 @@ static struct {
{"DGC", "RAID", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, storage on LUN 0 */
{"DGC", "DISK", NULL, BLIST_SPARSELUN}, /* EMC CLARiiON, no storage on LUN 0 */
{"EMC", "Invista", "*", BLIST_SPARSELUN | BLIST_LARGELUN},
- {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN | BLIST_REPORTLUN2},
+ {"EMC", "SYMMETRIX", NULL, BLIST_SPARSELUN | BLIST_LARGELUN |
+ BLIST_REPORTLUN2 | BLIST_RETRY_ITF},
{"EMULEX", "MD21/S2 ESDI", NULL, BLIST_SINGLELUN},
{"easyRAID", "16P", NULL, BLIST_NOREPORTLUN},
{"easyRAID", "X6P", NULL, BLIST_NOREPORTLUN},
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index ac3b1c3..1dee91f 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -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"
@@ -524,6 +525,9 @@ 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:
diff --git a/include/scsi/scsi_devinfo.h b/include/scsi/scsi_devinfo.h
index 3434e14..91a327e 100644
--- a/include/scsi/scsi_devinfo.h
+++ b/include/scsi/scsi_devinfo.h
@@ -63,8 +63,10 @@
#define BLIST_MAX_1024 ((__force blist_flags_t)(1ULL << 30))
/* Use UNMAP limit for WRITE SAME */
#define BLIST_UNMAP_LIMIT_WS ((__force blist_flags_t)(1ULL << 31))
+/* Always retry ABORTED_COMMAND with Internal Target Failure */
+#define BLIST_RETRY_ITF ((__force blist_flags_t)(1ULL << 32))
-#define __BLIST_LAST_USED BLIST_UNMAP_LIMIT_WS
+#define __BLIST_LAST_USED BLIST_RETRY_ITF
#define __BLIST_HIGH_UNUSED (~(__BLIST_LAST_USED | \
(__force blist_flags_t) \
--
2.16.1
