scsi: lpfc: Fix port relogin failure due to GID_FT interaction

In cases of remote-port-side cable pull/replug, there happens to be a
target that upon replug will send the port a PLOGI, a PRLI, and a LOGO.
When this sequence is received by the driver, the PLOGI accepted and a
GFT_ID is issued to find the protocol support for the remote port. While
the GFT_ID is outstanding, a LOGO is received. The driver logs the remote
port out and unregisters the RPI and schedules a new PLOGI transmission.
However, the GFT_ID was not terminated. When it completed, the driver
attempted to transition the remote port to PRLI transmission, which cancels
the PLOGI scheduling. The PRLI transmit attempt is rejected by the adapter
as the remote port is not logged in. No retry is attempted as it's expected
the logout is noted and the supposedly scheduled PLOGI should address the
state. As there is no PLOGI, the remote port does not get re-discovered.

Fix by aborting the outstanding GFT_ID if the related remote port is logged
out.

Ensure a PRLI transmit attempt only occurs if the remote port is logging
in. This avoids the incorrect attempt while logged out.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c
index 59252bfca14e..c58000cd744f 100644
--- a/drivers/scsi/lpfc/lpfc_nportdisc.c
+++ b/drivers/scsi/lpfc/lpfc_nportdisc.c
@@ -1661,6 +1661,7 @@ lpfc_rcv_logo_reglogin_issue(struct lpfc_vport *vport,
 	LPFC_MBOXQ_t	  *mb;
 	LPFC_MBOXQ_t	  *nextmb;
 	struct lpfc_dmabuf *mp;
+	struct lpfc_nodelist *ns_ndlp;
 
 	cmdiocb = (struct lpfc_iocbq *) arg;
 
@@ -1693,6 +1694,13 @@ lpfc_rcv_logo_reglogin_issue(struct lpfc_vport *vport,
 	}
 	spin_unlock_irq(&phba->hbalock);
 
+	/* software abort if any GID_FT is outstanding */
+	if (vport->cfg_enable_fc4_type != LPFC_ENABLE_FCP) {
+		ns_ndlp = lpfc_findnode_did(vport, NameServer_DID);
+		if (ns_ndlp && NLP_CHK_NODE_ACT(ns_ndlp))
+			lpfc_els_abort(phba, ns_ndlp);
+	}
+
 	lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
 	return ndlp->nlp_state;
 }