[PATCH v2 13/21] lpfc: Fix oops if nvmet_fc_register_targetport fails

James Smart
2017-09-30T00:35:08Z

if nvmet targetport registration fails, the driver encounters a
NULL pointer oops in lpfc_hb_timeout_handler.

To fix: if registration fails, ensure nvmet_support is cleared
on the port structure.

Also enhanced the log message on failure.

Cc: <stable@vger.kernel.org> # 4.12+
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>
---
drivers/scsi/lpfc/lpfc_nvmet.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_nvmet.c b/drivers/scsi/lpfc/lpfc_nvmet.c
index e410a6f1e2c2..1746c888beac 100644
--- a/drivers/scsi/lpfc/lpfc_nvmet.c
+++ b/drivers/scsi/lpfc/lpfc_nvmet.c
@@ -1153,9 +1153,14 @@ lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
#endif
if (error) {
lpfc_printf_log(phba, KERN_ERR, LOG_NVME_DISC,
- "6025 Cannot register NVME targetport "
- "x%x\n", error);
+ "6025 Cannot register NVME targetport x%x: "
+ "portnm %llx nodenm %llx segs %d qs %d\n",
+ error,
+ pinfo.port_name, pinfo.node_name,
+ lpfc_tgttemplate.max_sgl_segments,
+ lpfc_tgttemplate.max_hw_queues);
phba->targetport = NULL;
+ phba->nvmet_support = 0;

lpfc_nvmet_cleanup_io_context(phba);

@@ -1167,9 +1172,11 @@ lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
"6026 Registered NVME "
"targetport: %p, private %p "
- "portnm %llx nodenm %llx\n",
+ "portnm %llx nodenm %llx segs %d qs %d\n",
phba->targetport, tgtp,
- pinfo.port_name, pinfo.node_name);
+ pinfo.port_name, pinfo.node_name,
+ lpfc_tgttemplate.max_sgl_segments,
+ lpfc_tgttemplate.max_hw_queues);

atomic_set(&tgtp->rcv_ls_req_in, 0);
atomic_set(&tgtp->rcv_ls_req_out, 0);
--
2.13.1