diff options
| author | James Smart <james.smart@avagotech.com> | 2015-05-22 10:42:43 -0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Odin.com> | 2015-06-13 08:24:13 -0700 |
| commit | 7c5e518cc02c64901cb8920b7f5b080b91375324 (patch) | |
| tree | efd40e18905c9d9ed42603a8ede4e03f9cde45b0 /drivers/scsi/lpfc/lpfc_hbadisc.c | |
| parent | ae374a308cbfeab3cf72ef7c57695d2145defeab (diff) | |
lpfc: 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@avagotech.com>
Signed-off-by: James Smart <james.smart@avagotech.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_hbadisc.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_hbadisc.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index 72a69d44c2b2..ce96d5bf8ae7 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; } |