Commit 50eba24f authored by Jamie Wellnitz's avatar Jamie Wellnitz Committed by James Bottomley
Browse files

[SCSI] lpfc 8.1.2: Modify RSCN handling to unregister rpis on lost FCP_TARGETs immediately 



Modify RSCN handling to unregister rpis on lost FCP_TARGETs immediately

Signed-off-by: default avatarJamie Wellnitz <Jamie.Wellnitz@emulex.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent 0c6ac8ef

drivers/scsi/lpfc/lpfc_ct.c

+30 −1
Original line number Diff line number Diff line
@@ -323,6 +323,7 @@ lpfc_ns_rsp(struct lpfc_hba * phba, struct lpfc_dmabuf * mp, uint32_t Size) 
	struct lpfc_sli_ct_request *Response =

		(struct lpfc_sli_ct_request *) mp->virt;

	struct lpfc_nodelist *ndlp = NULL;

	struct lpfc_nodelist *next_ndlp;

	struct lpfc_dmabuf *mlast, *next_mp;

	uint32_t *ctptr = (uint32_t *) & Response->un.gid.PortType;

	uint32_t Did;
@@ -391,8 +392,36 @@ lpfc_ns_rsp(struct lpfc_hba * phba, struct lpfc_dmabuf * mp, uint32_t Size) 
nsout1:

	list_del(&head);



	/* Here we are finished in the case RSCN */

	/*

 	 * The driver has cycled through all Nports in the RSCN payload.

 	 * Complete the handling by cleaning up and marking the

 	 * current driver state.

 	 */

	if (phba->hba_state == LPFC_HBA_READY) {



		/*

		 * Switch ports that connect a loop of multiple targets need

		 * special consideration.  The driver wants to unregister the

		 * rpi only on the target that was pulled from the loop.  On

		 * RSCN, the driver wants to rediscover an NPort only if the

		 * driver flagged it as NLP_NPR_2B_DISC.  Provided adisc is

		 * not enabled and the NPort is not capable of retransmissions

		 * (FC Tape) prevent timing races with the scsi error handler by

		 * unregistering the Nport's RPI.  This action causes all

		 * outstanding IO to flush back to the midlayer.

		 */

		list_for_each_entry_safe(ndlp, next_ndlp, &phba->fc_npr_list,

					 nlp_listp) {

			if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC) &&

			    (lpfc_rscn_payload_check(phba, ndlp->nlp_DID))) {

				if ((phba->cfg_use_adisc == 0) &&

				    !(ndlp->nlp_fcp_info &

				      NLP_FCP_2_DEVICE)) {

					lpfc_unreg_rpi(phba, ndlp);

					ndlp->nlp_flag &= ~NLP_NPR_ADISC;

				}

			}

		}

		lpfc_els_flush_rscn(phba);

		spin_lock_irq(phba->host->host_lock);

		phba->fc_flag |= FC_RSCN_MODE; /* we are still in RSCN mode */