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, 2 insertions, 0 deletions

diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
index 3507b3d7c0eb..659ecf48fb4a 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -295,6 +295,8 @@ struct scsi_lun {
 #define DID_PASSTHROUGH 0x0a    /* Force command past mid-layer            */
 #define DID_SOFT_ERROR  0x0b    /* The low level driver just wish a retry  */
 #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 DRIVER_OK       0x00    /* Driver status                           */
 
 /*