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scsi: lpfc: Fix NVME PRLI handling during RSCN 

A race condition was found whereby the initiator would receive the RSCN
for a new NVME device before it had a chance to register its FC4 support
with the fabric. Thus, when queried by the initiator, it would see that
the target supported FC-NVME.

Corrected by making the assumption that the target always supports
FC-NVME thus a PRLI is sent. It's ok for the target to reject it.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Dick Kennedy 2017-08-23 16:55:39 -07:00 committed by Martin K. Petersen
parent 4b40d02b8b
commit 991f0c0e33
1 changed files with 10 additions and 0 deletions
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10
drivers/scsi/lpfc/lpfc_els.c
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@ -2177,6 +2177,16 @@ lpfc_issue_els_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
uint16_t cmdsize;
u32 local_nlp_type, elscmd;
/*
* If we are in RSCN mode, the FC4 types supported from a
* previous GFT_ID command may not be accurate. So, if we
* are a NVME Initiator, always look for the possibility of
* the remote NPort beng a NVME Target.
*/
if (phba->sli_rev == LPFC_SLI_REV4 &&
vport->fc_flag & FC_RSCN_MODE &&
vport->nvmei_support)
ndlp->nlp_fc4_type |= NLP_FC4_NVME;
local_nlp_type = ndlp->nlp_fc4_type;
send_next_prli: