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scsi: lpfc: Fix crash in lpfc_nvme_fcp_io_submit during LIP

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The driver is seeing a NULL pointer in lpfc_nvme_fcp_io_submit.  This
was ultimately due to a transport AER being sent on a terminated
controller, thus some of the values were not set. In case we're in a
system without a corrected transport and in case a race condition occurs
where we enter the routine as the teardown is happening in a separate
thread, validate the parameters before starting the io.

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 2017-09-29 17:34:41 -07:00 committed by Martin K. Petersen
parent 42270dce9d
commit b7672ae681
1 changed files with 10 additions and 0 deletions
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10
drivers/scsi/lpfc/lpfc_nvme.c
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@ -1235,6 +1235,16 @@ lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport,
vport = lport->vport;
phba = vport->phba;
/* Validate pointers. */
if (!pnvme_lport || !pnvme_rport || !freqpriv) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR | LOG_NODE,
"6117 No Send:IO submit ptrs NULL, lport %p, "
"rport %p fcreq_priv %p\n",
pnvme_lport, pnvme_rport, freqpriv);
ret = -ENODEV;
goto out_fail;
}
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
if (phba->ktime_on)
start = ktime_get_ns();