diff options
| author | James Smart <jsmart2021@gmail.com> | 2021-01-04 21:02:29 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-01-08 07:02:35 +0300 |
| commit | 07aaefdf75c50b55e1f1e1c904fa6d00466e0a75 (patch) | |
| tree | 2e9319d64373ce5d132384e8ffade776f3ae1aa7 /drivers/scsi/lpfc/lpfc_nportdisc.c | |
| parent | ecf041fe9895c3f5c0119fb427fa634a275c9382 (diff) | |
| download | linux-07aaefdf75c50b55e1f1e1c904fa6d00466e0a75.tar.xz | |
scsi: lpfc: Fix crash when a fabric node is released prematurely
The driver's management of the fabric controller (aka pseudo-scsi
initiator) node in SLI3 mode is causing this crash. The crash occurs
because of a node reference imbalance that frees the fabric controller node
while devloss is outstanding from the SCSI transport. This is triggered by
an odd behavior where the switch reacts to a rejected RDP request with a
PLOGI and nothing else, not even a LOGO. The driver ACKS the PLOGI and
after successfully registering the RPI, incorrectly registers the fabric
controller node because it has the NLP_FC4_FCP flag still set from the
fabric controller PRLI. If a LIP is issued, the driver attempts to cleanup
on Link Up and ends up executing too many puts.
Fix by detecting the fabric node type and clearing out the nodes internal
flags that triggered a SCSI transport registration and subsequence dev_loss
event. The driver cannot count on any persistence from fabric controller
nodes.
Link: https://lore.kernel.org/r/20210104180240.46824-5-jsmart2021@gmail.com
Co-developed-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_nportdisc.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_nportdisc.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c index 4961a8a55844..0d0d2ca1a5d8 100644 --- a/drivers/scsi/lpfc/lpfc_nportdisc.c +++ b/drivers/scsi/lpfc/lpfc_nportdisc.c @@ -1021,7 +1021,12 @@ lpfc_rcv_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp, ndlp->nlp_fc4_type |= NLP_FC4_NVME; lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE); } - if (npr->prliType == PRLI_FCP_TYPE) + + /* Fabric Controllers send FCP PRLI as an initiator but should + * not get recognized as FCP type and registered with transport. + */ + if (npr->prliType == PRLI_FCP_TYPE && + !(ndlp->nlp_type & NLP_FABRIC)) ndlp->nlp_fc4_type |= NLP_FC4_FCP; } if (rport) { @@ -2044,6 +2049,7 @@ lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_vport *vport, * must complete PRLI. */ if (ndlp->nlp_type & NLP_FABRIC) { + ndlp->nlp_fc4_type &= ~NLP_FC4_FCP; ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE; lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE); } |