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scsi: lpfc: Fix discovery failures during port failovers with lots of vports

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The driver is getting hit with 100s of RSCNs during remote port address
changes. Each of those RSCN's ends up generating UNREG_RPI and REG_PRI
mailbox commands.  The discovery engine within the driver doesn't wait for
the mailbox command completions. Instead it sets state flags and moves
forward. At some point, there's a massive backlog of mailbox commands which
take time for the adapter to process. Additionally, it appears there were
duplicate events from the switch so the driver generated duplicate mailbox
commands for the same remote port.  During this window, failures on PLOGI
and PRLI ELS's are see as the adapter is rejecting them as they are for
remote ports that still have pending mailbox commands.

Streamline the discovery engine so that PLOGI log checks for outstanding
UNREG_RPIs and defer the processing until the commands complete. This
better synchronizes the ELS transmission vs the RPI registrations.

Filter out multiple UNREG_RPIs being queued up for the same remote port.

Beef up log messages in this area.

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>
This commit is contained in:
James Smart 2018-11-29 16:09:30 -08:00 committed by Martin K. Petersen
parent 3e1f071892
commit dea16bdae2
7 changed files with 207 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/scsi/lpfc/lpfc_crtn.h
View File

@ -74,7 +74,6 @@ void lpfc_mbx_cmpl_read_topology(struct lpfc_hba *, LPFC_MBOXQ_t *);
void lpfc_init_vpi_cmpl(struct lpfc_hba *, LPFC_MBOXQ_t *);
void lpfc_cancel_all_vport_retry_delay_timer(struct lpfc_hba *);
void lpfc_retry_pport_discovery(struct lpfc_hba *);
void lpfc_release_rpi(struct lpfc_hba *, struct lpfc_vport *, uint16_t);
int lpfc_init_iocb_list(struct lpfc_hba *phba, int cnt);
void lpfc_free_iocb_list(struct lpfc_hba *phba);
int lpfc_post_rq_buffer(struct lpfc_hba *phba, struct lpfc_queue *hrq,

2
drivers/scsi/lpfc/lpfc_debugfs.c
View File

@ -645,6 +645,8 @@ lpfc_debugfs_nodelist_data(struct lpfc_vport *vport, char *buf, int size)
i, ndlp->cmd_qdepth);
outio += i;
}
len += snprintf(buf + len, size - len, "defer:%x ",
ndlp->nlp_defer_did);
len += snprintf(buf+len, size-len, "\n");
}
spin_unlock_irq(shost->host_lock);

4
drivers/scsi/lpfc/lpfc_disc.h
View File

@ -138,6 +138,7 @@ struct lpfc_nodelist {
uint32_t nvme_fb_size; /* NVME target's supported byte cnt */
#define NVME_FB_BIT_SHIFT 9 /* PRLI Rsp first burst in 512B units. */
uint32_t nlp_defer_did;
};
struct lpfc_node_rrq {
struct list_head list;
@ -165,6 +166,7 @@ struct lpfc_node_rrq {
#define NLP_ELS_SND_MASK 0x000007e0 /* sent ELS request for this entry */
#define NLP_NVMET_RECOV 0x00001000 /* NVMET auditing node for recovery. */
#define NLP_FCP_PRLI_RJT 0x00002000 /* Rport does not support FCP PRLI. */
#define NLP_UNREG_INP 0x00008000 /* UNREG_RPI cmd is in progress */
#define NLP_DEFER_RM 0x00010000 /* Remove this ndlp if no longer used */
#define NLP_DELAY_TMO 0x00020000 /* delay timeout is running for node */
#define NLP_NPR_2B_DISC 0x00040000 /* node is included in num_disc_nodes */
@ -293,4 +295,4 @@ struct lpfc_node_rrq {
#define NLP_EVT_DEVICE_RM 0xb /* Device not found in NS / ALPAmap */
#define NLP_EVT_DEVICE_RECOVERY 0xc /* Device existence unknown */
#define NLP_EVT_MAX_EVENT 0xd
#define NLP_EVT_NOTHING_PENDING 0xff

69
drivers/scsi/lpfc/lpfc_els.c
View File

@ -315,20 +315,20 @@ lpfc_prep_els_iocb(struct lpfc_vport *vport, uint8_t expectRsp,
/* Xmit ELS command <elsCmd> to remote NPORT <did> */
lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
"0116 Xmit ELS command x%x to remote "
"NPORT x%x I/O tag: x%x, port state:x%x"
" fc_flag:x%x\n",
"NPORT x%x I/O tag: x%x, port state:x%x "
"rpi x%x fc_flag:x%x\n",
elscmd, did, elsiocb->iotag,
vport->port_state,
vport->port_state, ndlp->nlp_rpi,
vport->fc_flag);
} else {
/* Xmit ELS response <elsCmd> to remote NPORT <did> */
lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
"0117 Xmit ELS response x%x to remote "
"NPORT x%x I/O tag: x%x, size: x%x "
"port_state x%x fc_flag x%x\n",
"port_state x%x rpi x%x fc_flag x%x\n",
elscmd, ndlp->nlp_DID, elsiocb->iotag,
cmdSize, vport->port_state,
vport->fc_flag);
ndlp->nlp_rpi, vport->fc_flag);
}
return elsiocb;
@ -1642,7 +1642,19 @@ lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
spin_lock_irq(shost->host_lock);
keep_nlp_flag = new_ndlp->nlp_flag;
new_ndlp->nlp_flag = ndlp->nlp_flag;
ndlp->nlp_flag = keep_nlp_flag;
/* if new_ndlp had NLP_UNREG_INP set, keep it */
if (keep_nlp_flag & NLP_UNREG_INP)
new_ndlp->nlp_flag |= NLP_UNREG_INP;
else
new_ndlp->nlp_flag &= ~NLP_UNREG_INP;
/* if ndlp had NLP_UNREG_INP set, keep it */
if (ndlp->nlp_flag & NLP_UNREG_INP)
ndlp->nlp_flag = keep_nlp_flag | NLP_UNREG_INP;
else
ndlp->nlp_flag = keep_nlp_flag & ~NLP_UNREG_INP;
spin_unlock_irq(shost->host_lock);
/* Set nlp_states accordingly */
@ -1919,7 +1931,7 @@ lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
disc = (ndlp->nlp_flag & NLP_NPR_2B_DISC);
ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
spin_unlock_irq(shost->host_lock);
rc = 0;
rc = 0;
/* PLOGI completes to NPort <nlp_DID> */
lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
@ -2026,8 +2038,29 @@ lpfc_issue_els_plogi(struct lpfc_vport *vport, uint32_t did, uint8_t retry)
int ret;
ndlp = lpfc_findnode_did(vport, did);
if (ndlp && !NLP_CHK_NODE_ACT(ndlp))
ndlp = NULL;
if (ndlp) {
/* Defer the processing of the issue PLOGI until after the
* outstanding UNREG_RPI mbox command completes, unless we
* are going offline. This logic does not apply for Fabric DIDs
*/
if ((ndlp->nlp_flag & NLP_UNREG_INP) &&
((ndlp->nlp_DID & Fabric_DID_MASK) != Fabric_DID_MASK) &&
!(vport->fc_flag & FC_OFFLINE_MODE)) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
"4110 Issue PLOGI x%x deferred "
"on NPort x%x rpi x%x Data: %p\n",
ndlp->nlp_defer_did, ndlp->nlp_DID,
ndlp->nlp_rpi, ndlp);
/* We can only defer 1st PLOGI */
if (ndlp->nlp_defer_did == NLP_EVT_NOTHING_PENDING)
ndlp->nlp_defer_did = did;
return 0;
}
if (!NLP_CHK_NODE_ACT(ndlp))
ndlp = NULL;
}
/* If ndlp is not NULL, we will bump the reference count on it */
cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
@ -2161,7 +2194,7 @@ lpfc_cmpl_els_prli(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
else
lpfc_disc_state_machine(vport, ndlp, cmdiocb,
NLP_EVT_CMPL_PRLI);
} else
} else {
/* Good status, call state machine. However, if another
* PRLI is outstanding, don't call the state machine
* because final disposition to Mapped or Unmapped is
@ -2169,6 +2202,7 @@ lpfc_cmpl_els_prli(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
*/
lpfc_disc_state_machine(vport, ndlp, cmdiocb,
NLP_EVT_CMPL_PRLI);
}
out:
lpfc_els_free_iocb(phba, cmdiocb);
@ -2227,7 +2261,7 @@ lpfc_issue_els_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
ndlp->nlp_type &= ~(NLP_NVME_TARGET | NLP_NVME_INITIATOR);
ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
ndlp->nlp_flag &= ~NLP_FIRSTBURST;
ndlp->nlp_flag &= ~(NLP_FIRSTBURST | NLP_NPR_2B_DISC);
ndlp->nvme_fb_size = 0;
send_next_prli:
@ -6112,6 +6146,19 @@ lpfc_rscn_recovery_check(struct lpfc_vport *vport)
if (vport->phba->nvmet_support)
continue;
/* If we are in the process of doing discovery on this
* NPort, let it continue on its own.
*/
switch (ndlp->nlp_state) {
case NLP_STE_PLOGI_ISSUE:
case NLP_STE_ADISC_ISSUE:
case NLP_STE_REG_LOGIN_ISSUE:
case NLP_STE_PRLI_ISSUE:
case NLP_STE_LOGO_ISSUE:
continue;
}
lpfc_disc_state_machine(vport, ndlp, NULL,
NLP_EVT_DEVICE_RECOVERY);
lpfc_cancel_retry_delay_tmo(vport, ndlp);

62
drivers/scsi/lpfc/lpfc_hbadisc.c
View File

@ -4444,6 +4444,7 @@ lpfc_initialize_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
NLP_INT_NODE_ACT(ndlp);
atomic_set(&ndlp->cmd_pending, 0);
ndlp->cmd_qdepth = vport->cfg_tgt_queue_depth;
ndlp->nlp_defer_did = NLP_EVT_NOTHING_PENDING;
}
struct lpfc_nodelist *
@ -4451,10 +4452,11 @@ lpfc_enable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
int state)
{
struct lpfc_hba *phba = vport->phba;
uint32_t did;
uint32_t did, flag;
unsigned long flags;
unsigned long *active_rrqs_xri_bitmap = NULL;
int rpi = LPFC_RPI_ALLOC_ERROR;
uint32_t defer_did = 0;
if (!ndlp)
return NULL;
@ -4487,16 +4489,23 @@ lpfc_enable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
goto free_rpi;
}
/* Keep the original DID */
/* First preserve the orginal DID, xri_bitmap and some flags */
did = ndlp->nlp_DID;
flag = (ndlp->nlp_flag & NLP_UNREG_INP);
if (flag & NLP_UNREG_INP)
defer_did = ndlp->nlp_defer_did;
if (phba->sli_rev == LPFC_SLI_REV4)
active_rrqs_xri_bitmap = ndlp->active_rrqs_xri_bitmap;
/* re-initialize ndlp except of ndlp linked list pointer */
/* Zero ndlp except of ndlp linked list pointer */
memset((((char *)ndlp) + sizeof (struct list_head)), 0,
sizeof (struct lpfc_nodelist) - sizeof (struct list_head));
lpfc_initialize_node(vport, ndlp, did);
/* Next reinitialize and restore saved objects */
lpfc_initialize_node(vport, ndlp, did);
ndlp->nlp_flag |= flag;
if (flag & NLP_UNREG_INP)
ndlp->nlp_defer_did = defer_did;
if (phba->sli_rev == LPFC_SLI_REV4)
ndlp->active_rrqs_xri_bitmap = active_rrqs_xri_bitmap;
@ -4761,6 +4770,20 @@ lpfc_nlp_logo_unreg(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
return;
lpfc_issue_els_logo(vport, ndlp, 0);
mempool_free(pmb, phba->mbox_mem_pool);
/* Check to see if there are any deferred events to process */
if ((ndlp->nlp_flag & NLP_UNREG_INP) &&
(ndlp->nlp_defer_did != NLP_EVT_NOTHING_PENDING)) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
"1434 UNREG cmpl deferred logo x%x "
"on NPort x%x Data: x%x %p\n",
ndlp->nlp_rpi, ndlp->nlp_DID,
ndlp->nlp_defer_did, ndlp);
ndlp->nlp_flag &= ~NLP_UNREG_INP;
ndlp->nlp_defer_did = NLP_EVT_NOTHING_PENDING;
lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
}
}
/*
@ -4789,6 +4812,21 @@ lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
"did x%x\n",
ndlp->nlp_rpi, ndlp->nlp_flag,
ndlp->nlp_DID);
/* If there is already an UNREG in progress for this ndlp,
* no need to queue up another one.
*/
if (ndlp->nlp_flag & NLP_UNREG_INP) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
"1436 unreg_rpi SKIP UNREG x%x on "
"NPort x%x deferred x%x flg x%x "
"Data: %p\n",
ndlp->nlp_rpi, ndlp->nlp_DID,
ndlp->nlp_defer_did,
ndlp->nlp_flag, ndlp);
goto out;
}
mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (mbox) {
/* SLI4 ports require the physical rpi value. */
@ -4815,10 +4853,22 @@ lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
* accept PLOGIs after unreg_rpi_cmpl
*/
acc_plogi = 0;
} else
} else {
mbox->ctx_ndlp = ndlp;
mbox->mbox_cmpl =
lpfc_sli_def_mbox_cmpl;
}
}
if (((ndlp->nlp_DID & Fabric_DID_MASK) !=
Fabric_DID_MASK) &&
(!(vport->fc_flag & FC_OFFLINE_MODE)))
ndlp->nlp_flag |= NLP_UNREG_INP;
lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
"1433 unreg_rpi UNREG x%x on "
"NPort x%x deferred flg x%x Data:%p\n",
ndlp->nlp_rpi, ndlp->nlp_DID,
ndlp->nlp_flag, ndlp);
rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
if (rc == MBX_NOT_FINISHED) {
@ -4827,7 +4877,7 @@ lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
}
}
lpfc_no_rpi(phba, ndlp);
out:
if (phba->sli_rev != LPFC_SLI_REV4)
ndlp->nlp_rpi = 0;
ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;

44
drivers/scsi/lpfc/lpfc_nportdisc.c
View File

@ -871,13 +871,26 @@ lpfc_disc_set_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
* to release a rpi.
**/
void
lpfc_release_rpi(struct lpfc_hba *phba,
struct lpfc_vport *vport,
uint16_t rpi)
lpfc_release_rpi(struct lpfc_hba *phba, struct lpfc_vport *vport,
struct lpfc_nodelist *ndlp, uint16_t rpi)
{
LPFC_MBOXQ_t *pmb;
int rc;
/* If there is already an UNREG in progress for this ndlp,
* no need to queue up another one.
*/
if (ndlp->nlp_flag & NLP_UNREG_INP) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
"1435 release_rpi SKIP UNREG x%x on "
"NPort x%x deferred x%x flg x%x "
"Data: %p\n",
ndlp->nlp_rpi, ndlp->nlp_DID,
ndlp->nlp_defer_did,
ndlp->nlp_flag, ndlp);
return;
}
pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool,
GFP_KERNEL);
if (!pmb)
@ -886,6 +899,18 @@ lpfc_release_rpi(struct lpfc_hba *phba,
else {
lpfc_unreg_login(phba, vport->vpi, rpi, pmb);
pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
pmb->vport = vport;
pmb->ctx_ndlp = ndlp;
if (((ndlp->nlp_DID & Fabric_DID_MASK) != Fabric_DID_MASK) &&
(!(vport->fc_flag & FC_OFFLINE_MODE)))
ndlp->nlp_flag |= NLP_UNREG_INP;
lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
"1437 release_rpi UNREG x%x "
"on NPort x%x flg x%x\n",
ndlp->nlp_rpi, ndlp->nlp_DID, ndlp->nlp_flag);
rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
if (rc == MBX_NOT_FINISHED)
mempool_free(pmb, phba->mbox_mem_pool);
@ -906,7 +931,7 @@ lpfc_disc_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
(evt == NLP_EVT_CMPL_REG_LOGIN) &&
(!pmb->u.mb.mbxStatus)) {
rpi = pmb->u.mb.un.varWords[0];
lpfc_release_rpi(phba, vport, rpi);
lpfc_release_rpi(phba, vport, ndlp, rpi);
}
lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
"0271 Illegal State Transition: node x%x "
@ -1334,7 +1359,7 @@ lpfc_cmpl_reglogin_plogi_issue(struct lpfc_vport *vport,
if (!(phba->pport->load_flag & FC_UNLOADING) &&
!mb->mbxStatus) {
rpi = pmb->u.mb.un.varWords[0];
lpfc_release_rpi(phba, vport, rpi);
lpfc_release_rpi(phba, vport, ndlp, rpi);
}
return ndlp->nlp_state;
}
@ -2875,8 +2900,8 @@ lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
/* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
"0211 DSM in event x%x on NPort x%x in "
"state %d Data: x%x x%x\n",
evt, ndlp->nlp_DID, cur_state,
"state %d rpi x%x Data: x%x x%x\n",
evt, ndlp->nlp_DID, cur_state, ndlp->nlp_rpi,
ndlp->nlp_flag, ndlp->nlp_fc4_type);
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
@ -2889,8 +2914,9 @@ lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
/* DSM out state <rc> on NPort <nlp_DID> */
if (got_ndlp) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
"0212 DSM out state %d on NPort x%x Data: x%x\n",
rc, ndlp->nlp_DID, ndlp->nlp_flag);
"0212 DSM out state %d on NPort x%x "
"rpi x%x Data: x%x\n",
rc, ndlp->nlp_DID, ndlp->nlp_rpi, ndlp->nlp_flag);
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
"DSM out: ste:%d did:x%x flg:x%x",

59
drivers/scsi/lpfc/lpfc_sli.c
View File

@ -2493,6 +2493,30 @@ lpfc_sli_def_mbox_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
if (pmb->u.mb.mbxCommand == MBX_REG_LOGIN64) {
ndlp = (struct lpfc_nodelist *)pmb->ctx_ndlp;
lpfc_nlp_put(ndlp);
pmb->ctx_buf = NULL;
pmb->ctx_ndlp = NULL;
}
if (pmb->u.mb.mbxCommand == MBX_UNREG_LOGIN) {
ndlp = (struct lpfc_nodelist *)pmb->ctx_ndlp;
/* Check to see if there are any deferred events to process */
if (ndlp) {
lpfc_printf_vlog(
vport,
KERN_INFO, LOG_MBOX | LOG_DISCOVERY,
"1438 UNREG cmpl deferred mbox x%x "
"on NPort x%x Data: x%x x%x %p\n",
ndlp->nlp_rpi, ndlp->nlp_DID,
ndlp->nlp_flag, ndlp->nlp_defer_did, ndlp);
if ((ndlp->nlp_flag & NLP_UNREG_INP) &&
(ndlp->nlp_defer_did != NLP_EVT_NOTHING_PENDING)) {
ndlp->nlp_defer_did = NLP_EVT_NOTHING_PENDING;
lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
}
ndlp->nlp_flag &= ~NLP_UNREG_INP;
}
pmb->ctx_ndlp = NULL;
}
@ -2534,14 +2558,37 @@ lpfc_sli4_unreg_rpi_cmpl_clr(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
&phba->sli4_hba.sli_intf) >=
LPFC_SLI_INTF_IF_TYPE_2)) {
if (ndlp) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_SLI,
"0010 UNREG_LOGIN vpi:%x "
"rpi:%x DID:%x map:%x %p\n",
vport->vpi, ndlp->nlp_rpi,
ndlp->nlp_DID,
ndlp->nlp_usg_map, ndlp);
lpfc_printf_vlog(
vport, KERN_INFO, LOG_MBOX | LOG_SLI,
"0010 UNREG_LOGIN vpi:%x "
"rpi:%x DID:%x defer x%x flg x%x "
"map:%x %p\n",
vport->vpi, ndlp->nlp_rpi,
ndlp->nlp_DID, ndlp->nlp_defer_did,
ndlp->nlp_flag,
ndlp->nlp_usg_map, ndlp);
ndlp->nlp_flag &= ~NLP_LOGO_ACC;
lpfc_nlp_put(ndlp);
/* Check to see if there are any deferred
* events to process
*/
if ((ndlp->nlp_flag & NLP_UNREG_INP) &&
(ndlp->nlp_defer_did !=
NLP_EVT_NOTHING_PENDING)) {
lpfc_printf_vlog(
vport, KERN_INFO, LOG_DISCOVERY,
"4111 UNREG cmpl deferred "
"clr x%x on "
"NPort x%x Data: x%x %p\n",
ndlp->nlp_rpi, ndlp->nlp_DID,
ndlp->nlp_defer_did, ndlp);
ndlp->nlp_defer_did =
NLP_EVT_NOTHING_PENDING;
lpfc_issue_els_plogi(
vport, ndlp->nlp_DID, 0);
}
ndlp->nlp_flag &= ~NLP_UNREG_INP;
}
}
}