From 02607fbaf00d9aac8fe97b1d9643f09ebdb47922 Mon Sep 17 00:00:00 2001 From: James Smart Date: Wed, 7 Jul 2021 11:43:48 -0700 Subject: [PATCH] scsi: lpfc: Skip reg_vpi when link is down for SLI3 in ADISC cmpl path During RSCN storms, some instances of LIP on SLI-3 adapters lead to a situation where FLOGIs keep failing with firmware indicating an illegal command error code. This situation was preceded by an ADISC completion that was processed while the link was down. This path on SLI-3 performs a CLEAR_LA and attempts to activate a VPI with REG_VPI. Later, as the FLOGI completes, it's no longer in sync with the VPI state. In SLI-3 it is illegal to have an active VPI during FLOGI. Resolve by circumventing the SLI-3 path that performs the CLEAR_LA and REG_VPI. The path will be taken after the FLOGI after the next Link Up. Link: https://lore.kernel.org/r/20210707184351.67872-18-jsmart2021@gmail.com Co-developed-by: Justin Tee Signed-off-by: Justin Tee Signed-off-by: James Smart Signed-off-by: Martin K. Petersen --- drivers/scsi/lpfc/lpfc_els.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index 11e56534b8f0..342c7e28ee95 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -2610,6 +2610,14 @@ lpfc_adisc_done(struct lpfc_vport *vport) if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) && !(vport->fc_flag & FC_RSCN_MODE) && (phba->sli_rev < LPFC_SLI_REV4)) { + + /* + * If link is down, clear_la and reg_vpi will be done after + * flogi following a link up event + */ + if (!lpfc_is_link_up(phba)) + return; + /* The ADISCs are complete. Doesn't matter if they * succeeded or failed because the ADISC completion * routine guarantees to call the state machine and -- GitLab