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lpfc: Fix for discovery failure in PT2PT when FLOGI's ELS ACC response gets aborted 

Fix for discovery failure in PT2PT when FLOGI's ELS ACC response gets aborted

Change login state machine to:
- Restart FLOGI if prior is ABTS'd
- Reject incoming FLOGIs if we have one pending

The above ensures that we always finish FLOGI processing, regardless
of who initated FLOGI, before processing PLOGI's.

Signed-off-by: Dick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: James Smart <james.smart@avagotech.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
James Smart 2015-08-31 16:48:18 -04:00 committed by James Bottomley
parent d38dd52c79
commit eec3d31219
1 changed files with 17 additions and 14 deletions
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31
drivers/scsi/lpfc/lpfc_els.c
View File

@ -5850,6 +5850,13 @@ lpfc_els_rcv_flogi(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
return 1;
}
/* send our FLOGI first */
if (vport->port_state < LPFC_FLOGI) {
vport->fc_myDID = 0;
lpfc_initial_flogi(vport);
vport->fc_myDID = Fabric_DID;
}
/* Send back ACC */
lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, NULL);
@ -7324,6 +7331,15 @@ lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
"Data: x%x x%x x%x x%x\n",
cmd, did, vport->port_state, vport->fc_flag,
vport->fc_myDID, vport->fc_prevDID);
/* reject till our FLOGI completes */
if ((vport->port_state < LPFC_FABRIC_CFG_LINK) &&
(cmd != ELS_CMD_FLOGI)) {
rjt_err = LSRJT_UNABLE_TPC;
rjt_exp = LSEXP_NOTHING_MORE;
goto lsrjt;
}
switch (cmd) {
case ELS_CMD_PLOGI:
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
@ -7361,20 +7377,6 @@ lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
rjt_exp = LSEXP_NOTHING_MORE;
break;
}
/* We get here, and drop thru, if we are PT2PT with
* another NPort and the other side has initiated
* the PLOGI before responding to our FLOGI.
*/
if (phba->sli_rev == LPFC_SLI_REV4 &&
(phba->fc_topology_changed ||
vport->fc_myDID != vport->fc_prevDID)) {
lpfc_unregister_fcf_prep(phba);
spin_lock_irq(shost->host_lock);
vport->fc_flag &= ~FC_VFI_REGISTERED;
spin_unlock_irq(shost->host_lock);
phba->fc_topology_changed = 0;
lpfc_issue_reg_vfi(vport);
}
}
spin_lock_irq(shost->host_lock);
@ -7605,6 +7607,7 @@ lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
break;
}
lsrjt:
/* check if need to LS_RJT received ELS cmd */
if (rjt_err) {
memset(&stat, 0, sizeof(stat));