[PATCH-v1 02/22] Fix nvme unregister port timeout.

jsmart2021
2017-04-20T04:46:57Z

From: James Smart <jsmart2021@gmail.com>

During some link event testing it was observed that the
wait_for_completion_timeout in the lpfc_nvme_unregister_port
was timing out all the time.

The initiator is claiming the nvme_fc_unregister_remoteport upcall is
not completing the unregister in the time allotted.
[ 2186.151317] lpfc 0000:07:00.0: 0:(0):6169 Unreg nvme wait failed 0

The wait_for_completion_timeout returns 0 when the wait has
been outstanding for the jiffies passed by the caller. In this error
message, the nvme initiator passed value 5 - meaning 5 jiffies -
and this is just wrong.

Calculate 5 seconds in Jiffies and pass that value
from the current jiffies.

Also the log message for the unregister timeout was reduced
because timeout failure is the same as timeout.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
---
drivers/scsi/lpfc/lpfc_nvme.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_nvme.c b/drivers/scsi/lpfc/lpfc_nvme.c
index 0024de1..a39d72c 100644
--- a/drivers/scsi/lpfc/lpfc_nvme.c
+++ b/drivers/scsi/lpfc/lpfc_nvme.c
@@ -2409,6 +2409,7 @@ lpfc_nvme_unregister_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
struct lpfc_nvme_lport *lport;
struct lpfc_nvme_rport *rport;
struct nvme_fc_remote_port *remoteport;
+ unsigned long wait_tmo;

localport = vport->localport;

@@ -2451,11 +2452,12 @@ lpfc_nvme_unregister_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
* before proceeding. This guarantees the transport and driver
* have completed the unreg process.
*/
- ret = wait_for_completion_timeout(&rport->rport_unreg_done, 5);
+ wait_tmo = msecs_to_jiffies(5000);
+ ret = wait_for_completion_timeout(&rport->rport_unreg_done,
+ wait_tmo);
if (ret == 0) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_NVME_DISC,
- "6169 Unreg nvme wait failed %d\n",
- ret);
+ "6169 Unreg nvme wait timeout\n");
}
}
return;
--
2.1.0