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scsi: lpfc: Discovery state machine fixes for LOGO handling 

If a LOGO is received for a node that is in the NPR state, post a DEVICE_RM
event to allow clean up of the logged out node.

Clearing the NLP_NPR_2B_DISC flag upon receipt of a LOGO ACC may cause
skipping of processing outstanding PLOGIs triggered by parallel RSCN
events.  If an outstanding PLOGI is being retried and receipt of a LOGO ACC
occurs, then allow the discovery state machine's PLOGI completion to clean
up the node.

Link: https://lore.kernel.org/r/20210707184351.67872-6-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@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 2021-07-07 11:43:36 -07:00 committed by Martin K. Petersen
parent 50baa1595d
commit e77803bdbf
1 changed files with 12 additions and 0 deletions
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12
drivers/scsi/lpfc/lpfc_els.c
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@ -4612,6 +4612,15 @@ lpfc_cmpl_els_logo_acc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
goto out;
if (ndlp->nlp_state == NLP_STE_NPR_NODE) {
/* If PLOGI is being retried, PLOGI completion will cleanup the
* node. The NLP_NPR_2B_DISC flag needs to be retained to make
* progress on nodes discovered from last RSCN.
*/
if ((ndlp->nlp_flag & NLP_DELAY_TMO) &&
(ndlp->nlp_last_elscmd == ELS_CMD_PLOGI))
goto out;
/* NPort Recovery mode or node is just allocated */
if (!lpfc_nlp_not_used(ndlp)) {
/* A LOGO is completing and the node is in NPR state.
@ -8948,6 +8957,9 @@ lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
break;
}
lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_LOGO);
if (newnode)
lpfc_disc_state_machine(vport, ndlp, NULL,
NLP_EVT_DEVICE_RM);
break;
case ELS_CMD_PRLO:
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,