[PATCH 08/17] lpfc: Add condition to delete ndlp object after sending BLS_RJT to an ABTS

[Justin Tee <justintee8345@gmail.com>]

The "Nodelist not empty" log message and an accompanying delay may be
observed when deleting an NPIV port or unloading the lpfc driver.  This
can occur due to receipt of an ABTS for which there is no corresponding
login context or ndlp allocated.  In such cases, the driver allocates a new
ndlp object to send a BLS_RJT after which the ndlp object unintentionally
remains in the NLP_STE_UNUSED_NODE state forever.

Add a check to conditionally remove ndlp's initial reference count when
queuing a BLS response.  If the initial reference is removed, then set
the NLP_DROPPED flag to notify other code paths.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
---
 drivers/scsi/lpfc/lpfc_sli.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index c7a2f565e2c2..29fd2eda70d5 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -18933,7 +18933,7 @@ lpfc_sli4_seq_abort_rsp(struct lpfc_vport *vport,
 					 "oxid:x%x SID:x%x\n", oxid, sid);
 			return;
 		}
-		/* Put ndlp onto pport node list */
+		/* Put ndlp onto vport node list */
 		lpfc_enqueue_node(vport, ndlp);
 	}
 
@@ -18953,7 +18953,7 @@ lpfc_sli4_seq_abort_rsp(struct lpfc_vport *vport,
 		return;
 	}
 
-	ctiocb->vport = phba->pport;
+	ctiocb->vport = vport;
 	ctiocb->cmd_cmpl = lpfc_sli4_seq_abort_rsp_cmpl;
 	ctiocb->sli4_lxritag = NO_XRI;
 	ctiocb->sli4_xritag = NO_XRI;
@@ -19040,6 +19040,16 @@ lpfc_sli4_seq_abort_rsp(struct lpfc_vport *vport,
 		ctiocb->ndlp = NULL;
 		lpfc_sli_release_iocbq(phba, ctiocb);
 	}
+
+	/* if only usage of this nodelist is BLS response, release initial ref
+	 * to free ndlp when transmit completes
+	 */
+	if (ndlp->nlp_state == NLP_STE_UNUSED_NODE &&
+	    !(ndlp->nlp_flag & NLP_DROPPED) &&
+	    !(ndlp->fc4_xpt_flags & (NVME_XPT_REGD | SCSI_XPT_REGD))) {
+		ndlp->nlp_flag |= NLP_DROPPED;
+		lpfc_nlp_put(ndlp);
+	}
 }
 
 /**
-- 
2.38.0