3 files changed, 21 insertions, 2 deletions

diff --git a/drivers/scsi/constants.c b/drivers/scsi/constants.c
index 9785d7384199..4003deefb7d8 100644
--- a/drivers/scsi/constants.c
+++ b/drivers/scsi/constants.c
@@ -1364,7 +1364,8 @@ EXPORT_SYMBOL(scsi_print_sense);
 static const char * const hostbyte_table[]={
 "DID_OK", "DID_NO_CONNECT", "DID_BUS_BUSY", "DID_TIME_OUT", "DID_BAD_TARGET",
 "DID_ABORT", "DID_PARITY", "DID_ERROR", "DID_RESET", "DID_BAD_INTR",
-"DID_PASSTHROUGH", "DID_SOFT_ERROR", "DID_IMM_RETRY", "DID_REQUEUE"};
+"DID_PASSTHROUGH", "DID_SOFT_ERROR", "DID_IMM_RETRY", "DID_REQUEUE",
+"DID_TRANSPORT_DISRUPTED", "DID_TRANSPORT_FAILFAST" };
 #define NUM_HOSTBYTE_STRS ARRAY_SIZE(hostbyte_table)
 
 static const char * const driverbyte_table[]={
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index fecefa05cb62..5bf8be21a165 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1290,7 +1290,20 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd)
 
         case DID_REQUEUE:
                 return ADD_TO_MLQUEUE;
-
+        case DID_TRANSPORT_DISRUPTED:
+                /*
+                 * LLD/transport was disrupted during processing of the IO.
+                 * The transport class is now blocked/blocking,
+                 * and the transport will decide what to do with the IO
+                 * based on its timers and recovery capablilities.
+                 */
+                return ADD_TO_MLQUEUE;
+        case DID_TRANSPORT_FAILFAST:
+                /*
+                 * The transport decided to failfast the IO (most likely
+                 * the fast io fail tmo fired), so send IO directly upwards.
+                 */
+                return SUCCESS;
         case DID_ERROR:
                 if (msg_byte(scmd->result) == COMMAND_COMPLETE &&
                     status_byte(scmd->result) == RESERVATION_CONFLICT)
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
index 3a5662b2817e..a109165714d6 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -381,6 +381,11 @@ static inline int scsi_is_wlun(unsigned int lun)
 #define DID_IMM_RETRY   0x0c    /* Retry without decrementing retry count  */
 #define DID_REQUEUE     0x0d    /* Requeue command (no immediate retry) also
                                  * without decrementing the retry count    */
+#define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution
+                                      * and the driver blocked the port to
+                                      * recover the link. Transport class will
+                                      * retry or fail IO */
+#define DID_TRANSPORT_FAILFAST  0x0f /* Transport class fastfailed the io */
 #define DRIVER_OK       0x00    /* Driver status                           */
 
 /*