scsi: add DID_REQUEUE to the error handling

We have a DID_IMM_RETRY to require a retry at once, but we could do with
a DID_REQUEUE to instruct the mid-layer to treat this command in the
same manner as QUEUE_FULL or BUSY (i.e. halt the submission until
another command returns ... or the queue pressure builds if there are no
outstanding commands).

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 13bac93fc397..203a0812508a 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1306,6 +1306,9 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd)
         case DID_IMM_RETRY:
                 return NEEDS_RETRY;
 
+        case DID_REQUEUE:
+                return ADD_TO_MLQUEUE;
+
         case DID_ERROR:
                 if (msg_byte(scmd->result) == COMMAND_COMPLETE &&
                     status_byte(scmd->result) == RESERVATION_CONFLICT)