scsi: lpfc: Modify handling of ADISC based on ndlp state and RPI registration

In lpfc_check_adisc, remove the requirement that the ndlp object must have
been RPI registered.  Whether or not the ndlp is RPI registered is
unrelated to verifying that the received ADISC is intended for that ndlp
rport object.

After ADISC receipt, there's no need to put the ndlp state into NPR.  Let
the cmpl routines from the actions taken earlier in ADISC handling set the
proper ndlp state.

Also, refactor when a RESUME_RPI mailbox command should be sent.  It should
only be sent if the RPI registered flag is set.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20241212233309.71356-5-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 24 insertions, 19 deletions

diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c
index 71c76d90e8e7..5aa21c683ac6 100644
--- a/drivers/scsi/lpfc/lpfc_nportdisc.c
+++ b/drivers/scsi/lpfc/lpfc_nportdisc.c
@@ -64,9 +64,6 @@ static int
 lpfc_check_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 		 struct lpfc_name *nn, struct lpfc_name *pn)
 {
-	/* First, we MUST have a RPI registered */
-	if (!test_bit(NLP_RPI_REGISTERED, &ndlp->nlp_flag))
-		return 0;
 
 	/* Compare the ADISC rsp WWNN / WWPN matches our internal node
 	 * table entry for that node.
@@ -735,6 +732,7 @@ lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 	ADISC *ap;
 	uint32_t *lp;
 	uint32_t cmd;
+	int rc;
 
 	pcmd = cmdiocb->cmd_dmabuf;
 	lp = (uint32_t *) pcmd->virt;
@@ -759,21 +757,29 @@ lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 		 * resume the RPI before the ACC goes out.
 		 */
 		if (vport->phba->sli_rev == LPFC_SLI_REV4) {
-			elsiocb = kmalloc(sizeof(struct lpfc_iocbq),
-				GFP_KERNEL);
-			if (elsiocb) {
-				/* Save info from cmd IOCB used in rsp */
-				memcpy((uint8_t *)elsiocb, (uint8_t *)cmdiocb,
-					sizeof(struct lpfc_iocbq));
-
-				/* Save the ELS cmd */
-				elsiocb->drvrTimeout = cmd;
-
-				if (lpfc_sli4_resume_rpi(ndlp,
-						lpfc_mbx_cmpl_resume_rpi,
-						elsiocb))
-					kfree(elsiocb);
-				goto out;
+			/* Don't resume an unregistered RPI - unnecessary
+			 * mailbox. Just send the ACC when the RPI is not
+			 * registered.
+			 */
+			if (test_bit(NLP_RPI_REGISTERED, &ndlp->nlp_flag)) {
+				elsiocb = kmalloc(sizeof(*elsiocb), GFP_KERNEL);
+				if (elsiocb) {
+					/* Save info from cmd IOCB used in
+					 * rsp
+					 */
+					memcpy(elsiocb, cmdiocb,
+					       sizeof(*elsiocb));
+
+					elsiocb->drvrTimeout = cmd;
+
+					rc = lpfc_sli4_resume_rpi(ndlp,
+								  lpfc_mbx_cmpl_resume_rpi,
+								  elsiocb);
+					if (rc)
+						kfree(elsiocb);
+
+					goto out;
+				}
 			}
 		}
 
@@ -815,7 +821,6 @@ out:
 	set_bit(NLP_DELAY_TMO, &ndlp->nlp_flag);
 	ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 	ndlp->nlp_prev_state = ndlp->nlp_state;
-	lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 	return 0;
 }