From: James Smart <jsmart2021@gmail.com>
Date: Wed, 14 Aug 2019 16:56:32 -0700
Subject: scsi: lpfc: Fix PLOGI failure with high remoteport count
Patch-mainline: v5.4-rc1
Git-commit: 4f1a2fef2af6b8c746bc965e5f87cd3cdaf5f1f8
References: jsc#SLE-8284 jsc#SLE-8654
When connected to a high number of remote ports, the driver is encountering
PLOGI errors. The errors are due to adapter detected failures indicating
illegal field values.
Turns out the driver was prematurely clearing an RPI bitmask before waiting
for an UNREG_RPI mailbox completion. This allowed the RPI to be reused
before it was actually available.
Fix by clearing RPI bitmask only after UNREG_RPI mailbox completion.
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>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
drivers/scsi/lpfc/lpfc_disc.h | 1 +
drivers/scsi/lpfc/lpfc_hbadisc.c | 8 ++++++--
drivers/scsi/lpfc/lpfc_sli.c | 12 ++++++++++++
3 files changed, 19 insertions(+), 2 deletions(-)
--- a/drivers/scsi/lpfc/lpfc_disc.h
+++ b/drivers/scsi/lpfc/lpfc_disc.h
@@ -157,6 +157,7 @@ struct lpfc_node_rrq {
/* Defines for nlp_flag (uint32) */
#define NLP_IGNR_REG_CMPL 0x00000001 /* Rcvd rscn before we cmpl reg login */
#define NLP_REG_LOGIN_SEND 0x00000002 /* sent reglogin to adapter */
+#define NLP_RELEASE_RPI 0x00000004 /* Release RPI to free pool */
#define NLP_SUPPRESS_RSP 0x00000010 /* Remote NPort supports suppress rsp */
#define NLP_PLOGI_SND 0x00000020 /* sent PLOGI request for this entry */
#define NLP_PRLI_SND 0x00000040 /* sent PRLI request for this entry */
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -4805,6 +4805,10 @@ lpfc_nlp_logo_unreg(struct lpfc_hba *phb
ndlp->nlp_defer_did = NLP_EVT_NOTHING_PENDING;
lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
} else {
+ if (ndlp->nlp_flag & NLP_RELEASE_RPI) {
+ lpfc_sli4_free_rpi(vport->phba, ndlp->nlp_rpi);
+ ndlp->nlp_flag &= ~NLP_RELEASE_RPI;
+ }
ndlp->nlp_flag &= ~NLP_UNREG_INP;
}
}
@@ -5104,6 +5108,8 @@ lpfc_cleanup_node(struct lpfc_vport *vpo
list_del_init(&ndlp->els_retry_evt.evt_listp);
list_del_init(&ndlp->dev_loss_evt.evt_listp);
lpfc_cleanup_vports_rrqs(vport, ndlp);
+ if (phba->sli_rev == LPFC_SLI_REV4)
+ ndlp->nlp_flag |= NLP_RELEASE_RPI;
lpfc_unreg_rpi(vport, ndlp);
return 0;
@@ -6201,8 +6207,6 @@ lpfc_nlp_release(struct kref *kref)
spin_lock_irqsave(&phba->ndlp_lock, flags);
NLP_CLR_NODE_ACT(ndlp);
spin_unlock_irqrestore(&phba->ndlp_lock, flags);
- if (phba->sli_rev == LPFC_SLI_REV4)
- lpfc_sli4_free_rpi(phba, ndlp->nlp_rpi);
/* free ndlp memory for final ndlp release */
if (NLP_CHK_FREE_REQ(ndlp)) {
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -2507,6 +2507,11 @@ lpfc_sli_def_mbox_cmpl(struct lpfc_hba *
ndlp->nlp_defer_did = NLP_EVT_NOTHING_PENDING;
lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
} else {
+ if (ndlp->nlp_flag & NLP_RELEASE_RPI) {
+ lpfc_sli4_free_rpi(vport->phba,
+ ndlp->nlp_rpi);
+ ndlp->nlp_flag &= ~NLP_RELEASE_RPI;
+ }
ndlp->nlp_flag &= ~NLP_UNREG_INP;
}
pmb->ctx_ndlp = NULL;
@@ -2582,6 +2587,13 @@ lpfc_sli4_unreg_rpi_cmpl_clr(struct lpfc
lpfc_issue_els_plogi(
vport, ndlp->nlp_DID, 0);
} else {
+ if (ndlp->nlp_flag & NLP_RELEASE_RPI) {
+ lpfc_sli4_free_rpi(
+ vport->phba,
+ ndlp->nlp_rpi);
+ ndlp->nlp_flag &=
+ ~NLP_RELEASE_RPI;
+ }
ndlp->nlp_flag &= ~NLP_UNREG_INP;
}
}