diff options
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_hbadisc.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_hbadisc.c | 37 |
1 files changed, 29 insertions, 8 deletions
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index 644d96012d56..dc042bd97baa 100644 --- a/drivers/scsi/lpfc/lpfc_hbadisc.c +++ b/drivers/scsi/lpfc/lpfc_hbadisc.c @@ -149,7 +149,10 @@ lpfc_dev_loss_tmo_callbk(struct fc_rport *rport) return; spin_lock_irq(&phba->hbalock); - evtp->evt_arg1 = ndlp; + /* We need to hold the node by incrementing the reference + * count until this queued work is done + */ + evtp->evt_arg1 = lpfc_nlp_get(ndlp); evtp->evt = LPFC_EVT_DEV_LOSS; list_add_tail(&evtp->evt_listp, &phba->work_list); if (phba->work_wait) @@ -300,12 +303,18 @@ lpfc_work_list_done(struct lpfc_hba *phba) ndlp = (struct lpfc_nodelist *) (evtp->evt_arg1); lpfc_els_retry_delay_handler(ndlp); free_evt = 0; /* evt is part of ndlp */ + /* decrement the node reference count held + * for this queued work + */ + lpfc_nlp_put(ndlp); break; case LPFC_EVT_DEV_LOSS: ndlp = (struct lpfc_nodelist *)(evtp->evt_arg1); - lpfc_nlp_get(ndlp); lpfc_dev_loss_tmo_handler(ndlp); free_evt = 0; + /* decrement the node reference count held for + * this queued work + */ lpfc_nlp_put(ndlp); break; case LPFC_EVT_ONLINE: @@ -1176,6 +1185,9 @@ lpfc_mbx_cmpl_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb) lpfc_mbuf_free(phba, mp->virt, mp->phys); kfree(mp); mempool_free(pmb, phba->mbox_mem_pool); + /* decrement the node reference count held for this callback + * function. + */ lpfc_nlp_put(ndlp); return; @@ -1363,6 +1375,9 @@ lpfc_mbx_cmpl_ns_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb) if (mb->mbxStatus) { out: + /* decrement the node reference count held for this + * callback function. + */ lpfc_nlp_put(ndlp); lpfc_mbuf_free(phba, mp->virt, mp->phys); kfree(mp); @@ -1414,6 +1429,9 @@ out: goto out; } + /* decrement the node reference count held for this + * callback function. + */ lpfc_nlp_put(ndlp); lpfc_mbuf_free(phba, mp->virt, mp->phys); kfree(mp); @@ -1661,13 +1679,14 @@ void lpfc_drop_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp) { /* - * Use of lpfc_drop_node and UNUSED list. lpfc_drop_node should + * Use of lpfc_drop_node and UNUSED list: lpfc_drop_node should * be used if we wish to issue the "last" lpfc_nlp_put() to remove - * the ndlp from the vport. The ndlp resides on the UNUSED list - * until ALL other outstanding threads have completed. Thus, if a - * ndlp is on the UNUSED list already, we should never do another - * lpfc_drop_node() on it. + * the ndlp from the vport. The ndlp marked as UNUSED on the list + * until ALL other outstanding threads have completed. We check + * that the ndlp not already in the UNUSED state before we proceed. */ + if (ndlp->nlp_state == NLP_STE_UNUSED_NODE) + return; lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNUSED_NODE); lpfc_nlp_put(ndlp); return; @@ -2767,7 +2786,9 @@ lpfc_mbx_cmpl_fdmi_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb) else mod_timer(&vport->fc_fdmitmo, jiffies + HZ * 60); - /* Mailbox took a reference to the node */ + /* decrement the node reference count held for this callback + * function. + */ lpfc_nlp_put(ndlp); lpfc_mbuf_free(phba, mp->virt, mp->phys); kfree(mp); |