scsi: lpfc: Requeue SCSI I/O to upper layer when fw reports link down

During heavy I/O stress tests with 100+ vports and cable pulls, it may take
a while before the vport logs back into the fabric to resume I/O.

Currently, the driver immediately fails the I/O with DID_ERROR.

Change behavior to return DID_REQUEUE, and rely on SCSI layer's max retry
of 5 before erroring out the I/O.

Link: https://lore.kernel.org/r/20220412222008.126521-6-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index ba9dbb5..ae34085 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -4276,6 +4276,7 @@ lpfc_fcp_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
                        break;
                }
                if (lpfc_cmd->result == IOERR_INVALID_RPI ||
+                   lpfc_cmd->result == IOERR_LINK_DOWN ||
                    lpfc_cmd->result == IOERR_NO_RESOURCES ||
                    lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
                    lpfc_cmd->result == IOERR_RPI_SUSPENDED ||