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| author | James Smart <jsmart2021@gmail.com> | 2017-04-22 02:04:57 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-04-24 10:25:48 +0300 |
| commit | 4410a67a9e53d3cf8d1b88169c642d91f1292fb2 (patch) | |
| tree | e5a6973b130bfd96aa2c5be1b2cd849828ae88b0 /drivers | |
| parent | 3f247de750b8dd8f50a2c1390e2a1238790a9dff (diff) | |
| download | linux-4410a67a9e53d3cf8d1b88169c642d91f1292fb2.tar.xz | |
Fix nvme initiator handling when not enabled.
Fix nvme initiator handline when CONFIG_LPFC_NVME_INITIATOR is not enabled.
With update nvme upstream driver sources, loading
the driver with nvme enabled resulting in this Oops.
BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
IP: lpfc_nvme_update_localport+0x23/0xd0 [lpfc]
PGD 0
Oops: 0000 [#1] SMP
CPU: 0 PID: 10256 Comm: lpfc_worker_0 Tainted
Hardware name: ...
task: ffff881028191c40 task.stack: ffff880ffdf00000
RIP: 0010:lpfc_nvme_update_localport+0x23/0xd0 [lpfc]
RSP: 0018:ffff880ffdf03c20 EFLAGS: 00010202
Cause: As the initiator driver completes discovery at different stages,
it call lpfc_nvme_update_localport to hint that the DID and role may have
changed. In the implementation of lpfc_nvme_update_localport, the driver
was not validating the localport or the lport during the execution
of the update_localport routine. With the recent upstream additions to
the driver, the create_localport routine didn't run and so the localport
was NULL causing the page-fault Oops.
Fix: Add the CONFIG_LPFC_NVME_INITIATOR preprocessor inclusions to
lpfc_nvme_update_localport to turn off all routine processing when
the running kernel does not have NVME configured. Add NULL pointer
checks on the localport and lport in lpfc_nvme_update_localport and
dump messages if they are NULL and just exit.
Also one alingment issue fixed.
Repalces the ifdef with the IS_ENABLED macro.
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_attr.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_nvme.c | 15 |
2 files changed, 14 insertions, 3 deletions
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c index 22819afbaef5..4b32d021f7d9 100644 --- a/drivers/scsi/lpfc/lpfc_attr.c +++ b/drivers/scsi/lpfc/lpfc_attr.c @@ -3335,7 +3335,7 @@ LPFC_ATTR_R(enable_fc4_type, LPFC_ENABLE_FCP, * percentage will go to NVME. */ LPFC_ATTR_R(xri_split, 50, 10, 90, - "Division of XRI resources between SCSI and NVME"); + "Division of XRI resources between SCSI and NVME"); /* # lpfc_log_verbose: Only turn this flag on if you are willing to risk being diff --git a/drivers/scsi/lpfc/lpfc_nvme.c b/drivers/scsi/lpfc/lpfc_nvme.c index ee1a285d0820..264da8f02c97 100644 --- a/drivers/scsi/lpfc/lpfc_nvme.c +++ b/drivers/scsi/lpfc/lpfc_nvme.c @@ -2264,12 +2264,23 @@ lpfc_nvme_destroy_localport(struct lpfc_vport *vport) void lpfc_nvme_update_localport(struct lpfc_vport *vport) { +#if (IS_ENABLED(CONFIG_NVME_FC)) struct nvme_fc_local_port *localport; struct lpfc_nvme_lport *lport; localport = vport->localport; + if (!localport) { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME, + "6710 Update NVME fail. No localport\n"); + return; + } lport = (struct lpfc_nvme_lport *)localport->private; - + if (!lport) { + lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME, + "6171 Update NVME fail. localP %p, No lport\n", + localport); + return; + } lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME, "6012 Update NVME lport %p did x%x\n", localport, vport->fc_myDID); @@ -2283,7 +2294,7 @@ lpfc_nvme_update_localport(struct lpfc_vport *vport) lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC, "6030 bound lport %p to DID x%06x\n", lport, localport->port_id); - +#endif } int |