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scsi: lpfc: Fix PT2PT PLOGI collison stopping discovery

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Under heavy load the target stops responding, the drivers aborts
timeout and we start recovery by logging out of the target, but
the target is never logged into again.

In a point-to-point scenario, there were battling PLOGI's. When we
received a PLOGI request after having sent one, the driver cancels
the processing of the original plogi. However, the completion path
of the remaining plogi was coded to skip the reg_rpi that should
be happening on the 2nd plogi.

Correct by adding a simple pt2pt check such that the 2nd plogi isn't
skipped and the reg_login occurs.

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 2019-05-21 17:48:58 -07:00 committed by Martin K. Petersen
parent f6978f4163
commit f22bfe8d1c
1 changed files with 1 additions and 0 deletions
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1
drivers/scsi/lpfc/lpfc_els.c
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@ -4196,6 +4196,7 @@ lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
if ((rspiocb->iocb.ulpStatus == 0) if ((rspiocb->iocb.ulpStatus == 0)
&& (ndlp->nlp_flag & NLP_ACC_REGLOGIN)) { && (ndlp->nlp_flag & NLP_ACC_REGLOGIN)) {
if (!lpfc_unreg_rpi(vport, ndlp) && if (!lpfc_unreg_rpi(vport, ndlp) &&
(!(vport->fc_flag & FC_PT2PT)) &&
(ndlp->nlp_state == NLP_STE_PLOGI_ISSUE || (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
ndlp->nlp_state == NLP_STE_REG_LOGIN_ISSUE)) { ndlp->nlp_state == NLP_STE_REG_LOGIN_ISSUE)) {
lpfc_printf_vlog(vport, KERN_INFO, lpfc_printf_vlog(vport, KERN_INFO,