[dm-devel] [PATCH 5/7] lpfc: start to use new trasnport errors.

[michaelc at cs.wisc.edu]

From: Mike Christie <michaelc at cs.wisc.edu>

This is only a test patch to get lpfc going. For the case I changed
it looked like the rport is deleted then we fail these IOs with
DID_BUS_BUSY so using DID_TRANSPORT_DISRUPTED was correct. In testing
the driver by stopping the fcp service on the target this worked.

I was not sure if maybe this bus busy:
                case IOSTAT_NPORT_BSY:
                case IOSTAT_FABRIC_BSY:
                        cmd->result = ScsiResult(DID_BUS_BUSY, 0);
should also be converted. For qla2xxx I thought we blocked the
rport for similar errors (at least the names sounded similar :)) and so I
used DID_TRANSPORT_DISRUPTED, but for lpfc I could not
hit this code and was not sure by just looking at it if it was exactly
the same, so I did not touch it in this patch.

I was also not sure about some cases where if I just unplugged a cable.
I would sometimes get IOSTAT_LOCAL_REJECT with IOERR_DEFAULT, so it seemed
like DID_ERROR was right for that, but I had seen that there is also
a IOERR_LINK_DOWN value. Maybe for that if we end up deleting the rport
we should be returning DID_TRANSPORT_DISRUPTED, but I was not able to
hit that case and was not able to tell from the code when I should, so
I did not touch it.

Signed-off-by: Mike Christie <michaelc at cs.wisc.edu>
---
 drivers/scsi/lpfc/lpfc_scsi.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 0910a9a..83f7e43 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -590,7 +590,14 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 
 		if (!pnode || !NLP_CHK_NODE_ACT(pnode)
 		    || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
-			cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
+			/*
+			 * Port is not setup so fail IO with
+			 * DID_TRANSPORT_DISRUPTED, and allow the fc
+			 * class to determine what to do with it when
+			 * its timers fire.
+			 */
+			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
+						 SAM_STAT_BUSY);
 	} else {
 		cmd->result = ScsiResult(DID_OK, 0);
 	}
-- 
1.5.4.1