Fix to drop PLOGIs from fabric node till LOGO processing completes
The domain controller PLOGI's concurrent with prior LOGO's/unreg_rpi's
completing created a race condition where driver rpi ref count can
inadvertantly hit 0 and the rpi attempted to be freed. This error
sometimes resulted in Warning messages indicating kref.h via
lfpc_nlp_get+0x128.
Correct by dropping any new PLOGI until the prior nport state has settled.
Signed-off-by: Dick Kennedy <dick.kennedy@xxxxxxxxxxxxx>
Signed-off-by: James Smart <james.smart@xxxxxxxxxxxxx>
---
drivers/scsi/lpfc/lpfc_els.c | 14 +++-----------
drivers/scsi/lpfc/lpfc_hbadisc.c | 13 +++++++++++--
drivers/scsi/lpfc/lpfc_nportdisc.c | 2 +-
drivers/scsi/lpfc/lpfc_sli.c | 2 +-
4 files changed, 16 insertions(+), 15 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 21c4a3d..36bf58b 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -3668,16 +3668,6 @@ lpfc_cmpl_els_logo_acc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
* At this point, the driver is done so release the IOCB
*/
lpfc_els_free_iocb(phba, cmdiocb);
-
- /*
- * Remove the ndlp reference if it's a fabric node that has
- * sent us an unsolicted LOGO.
- */
- /* FIXME: this one frees ndlp before breaking rport link */
- if (ndlp->nlp_type & NLP_FABRIC)
- lpfc_nlp_put(ndlp);
-
- return;
}
/**
@@ -4022,7 +4012,9 @@ lpfc_els_rsp_acc(struct lpfc_vport *vport, uint32_t flag,
ndlp->nlp_rpi, vport->fc_flag);
if (ndlp->nlp_flag & NLP_LOGO_ACC) {
spin_lock_irq(shost->host_lock);
- ndlp->nlp_flag &= ~NLP_LOGO_ACC;
+ if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED ||
+ ndlp->nlp_flag & NLP_REG_LOGIN_SEND))
+ ndlp->nlp_flag &= ~NLP_LOGO_ACC;
spin_unlock_irq(shost->host_lock);
elsiocb->iocb_cmpl = lpfc_cmpl_els_logo_acc;
} else {
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index 72a69d4..ce96d5b 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -4495,7 +4495,7 @@ lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
struct lpfc_hba *phba = vport->phba;
LPFC_MBOXQ_t *mbox;
- int rc;
+ int rc, acc_plogi = 1;
uint16_t rpi;
if (ndlp->nlp_flag & NLP_RPI_REGISTERED ||
@@ -4528,14 +4528,20 @@ lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
mbox->context1 = lpfc_nlp_get(ndlp);
mbox->mbox_cmpl =
lpfc_sli4_unreg_rpi_cmpl_clr;
+ /*
+ * accept PLOGIs after unreg_rpi_cmpl
+ */
+ acc_plogi = 0;
} else
mbox->mbox_cmpl =
lpfc_sli_def_mbox_cmpl;
}
rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
- if (rc == MBX_NOT_FINISHED)
+ if (rc == MBX_NOT_FINISHED) {
mempool_free(mbox, phba->mbox_mem_pool);
+ acc_plogi = 1;
+ }
}
lpfc_no_rpi(phba, ndlp);
@@ -4543,8 +4549,11 @@ lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
ndlp->nlp_rpi = 0;
ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
ndlp->nlp_flag &= ~NLP_NPR_ADISC;
+ if (acc_plogi)
+ ndlp->nlp_flag &= ~NLP_LOGO_ACC;
return 1;
}
+ ndlp->nlp_flag &= ~NLP_LOGO_ACC;
return 0;
}
diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c
index 09de640..af3b38a 100644
--- a/drivers/scsi/lpfc/lpfc_nportdisc.c
+++ b/drivers/scsi/lpfc/lpfc_nportdisc.c
@@ -1874,7 +1874,7 @@ lpfc_rcv_logo_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *)arg;
spin_lock_irq(shost->host_lock);
- ndlp->nlp_flag &= NLP_LOGO_ACC;
+ ndlp->nlp_flag |= NLP_LOGO_ACC;
spin_unlock_irq(shost->host_lock);
lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
return ndlp->nlp_state;
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 07df296..4feb931 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -2249,7 +2249,7 @@ lpfc_sli4_unreg_rpi_cmpl_clr(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
vport->vpi, ndlp->nlp_rpi,
ndlp->nlp_DID,
ndlp->nlp_usg_map, ndlp);
-
+ ndlp->nlp_flag &= ~NLP_LOGO_ACC;
lpfc_nlp_put(ndlp);
}
}
--
1.7.11.7
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