[PATCH 06/10] lpfc: Correct used_rpi count when devloss tmo fires with no recovery

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A fabric controller can sometimes send an RDP request right before a link
down event.  Because of this outstanding RDP request, the driver does not
remove the last reference count on its ndlp causing a potential leak of
RPI resources when devloss tmo fires.

In lpfc_cmpl_els_rsp, modify the NPIV clause to always allow the
lpfc_drop_node routine to execute when not registered with SCSI transport.

This relaxes the contraint that an NPIV ndlp must be in a specific state
in order to call lpfc_drop node.  Logic is revised such that the
lpfc_drop_node routine is always called to ensure the last ndlp decrement
occurs.

Signed-off-by: Justin Tee <justin.tee@xxxxxxxxxxxx>
---
 drivers/scsi/lpfc/lpfc_els.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 0342e8cdcc9e..9f50f6116627 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -5457,18 +5457,20 @@ lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 	 * these conditions and release the RPI.
 	 */
 	if (phba->sli_rev == LPFC_SLI_REV4 &&
-	    (vport && vport->port_type == LPFC_NPIV_PORT) &&
-	    !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD) &&
-	    ndlp->nlp_flag & NLP_RELEASE_RPI) {
-		if (ndlp->nlp_state !=  NLP_STE_PLOGI_ISSUE &&
-		    ndlp->nlp_state != NLP_STE_REG_LOGIN_ISSUE) {
-			lpfc_sli4_free_rpi(phba, ndlp->nlp_rpi);
-			spin_lock_irq(&ndlp->lock);
-			ndlp->nlp_rpi = LPFC_RPI_ALLOC_ERROR;
-			ndlp->nlp_flag &= ~NLP_RELEASE_RPI;
-			spin_unlock_irq(&ndlp->lock);
-			lpfc_drop_node(vport, ndlp);
+	    vport && vport->port_type == LPFC_NPIV_PORT &&
+	    !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD)) {
+		if (ndlp->nlp_flag & NLP_RELEASE_RPI) {
+			if (ndlp->nlp_state != NLP_STE_PLOGI_ISSUE &&
+			    ndlp->nlp_state != NLP_STE_REG_LOGIN_ISSUE) {
+				lpfc_sli4_free_rpi(phba, ndlp->nlp_rpi);
+				spin_lock_irq(&ndlp->lock);
+				ndlp->nlp_rpi = LPFC_RPI_ALLOC_ERROR;
+				ndlp->nlp_flag &= ~NLP_RELEASE_RPI;
+				spin_unlock_irq(&ndlp->lock);
+			}
 		}
+
+		lpfc_drop_node(vport, ndlp);
 	}
 
 	/* Release the originating I/O reference. */
-- 
2.38.0




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