提交 7c5e518c 编写于 作者: J James Smart 提交者: James Bottomley

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: NDick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: NJames Smart <james.smart@avagotech.com>
Reviewed-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NJames Bottomley <JBottomley@Odin.com>
上级 ae374a30
......@@ -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;
}
/**
......@@ -4022,6 +4012,8 @@ 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);
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;
......
......@@ -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;
}
......
......@@ -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;
......
......@@ -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);
}
}
......
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