[PATCH 5/8] lpfc: Allow PLOGI retry if previous PLOGI was aborted

James Smart
2021-10-20T21:14:38Z

A remote nport can stop responding to PLOGI beyond the ELS IO timeout
under some fault conditions. When this happens, the non-response
triggers a dev_loss_tmo event from the transport which causes the driver
to abort the PLOGI and stop any retries. This was due to a policy in the
ELS completion handler whenever an ELS was terminated due to driver
request.

Revise the ELS completion path to detect PLOGI's that were aborted
and allow retries.

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>
---
drivers/scsi/lpfc/lpfc_els.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index de38f4b886ca..746fe9772453 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -4577,6 +4577,19 @@ lpfc_els_retry(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
retry = 1;
delay = 100;
break;
+ case IOERR_SLI_ABORTED:
+ /* Retry ELS PLOGI command?
+ * Possibly the rport just wasn't ready.
+ */
+ if (cmd == ELS_CMD_PLOGI) {
+ /* No retry if state change */
+ if (ndlp &&
+ ndlp->nlp_state != NLP_STE_PLOGI_ISSUE)
+ goto out_retry;
+ retry = 1;
+ maxretry = 2;
+ }
+ break;
}
break;

--
2.26.2