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scsi: lpfc: Check devloss callbk done flag for potential stale NDLP ptrs

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Should an rport remain in the NOTPRESENT state it is possible that
stgt_delete_work is scheduled after dev_loss_tmo_callbk.  In such cases,
dev_loss_tmo_callbk would have cleaned up the NDLP object resulting in
stale ndlp pointers in lpfc_terminate_rport_io().

Check for the DEVLOSS_CALLBK_DONE flag to know if dev_loss_tmo_callbk
has been called.  This is a more reliable way to avoid dereferencing
stale NDLP pointers.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20241031223219.152342-3-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Justin Tee 2024-10-31 15:32:10 -07:00 committed by Martin K. Petersen
parent 29a64210c7
commit 4c113ac05b
1 changed files with 6 additions and 0 deletions
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6
drivers/scsi/lpfc/lpfc_hbadisc.c
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@ -100,6 +100,12 @@ lpfc_rport_invalid(struct fc_rport *rport)
return -EINVAL;
}
if (rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) {
pr_info("**** %s: devloss_callbk_done rport x%px SID x%x\n",
__func__, rport, rport->scsi_target_id);
return -EINVAL;
}
rdata = rport->dd_data;
if (!rdata) {
pr_err("**** %s: NULL dd_data on rport x%px SID x%x\n",