modprobe -r lpfc produces the following:
Call Trace:
__blk_mq_run_hw_queue+0xa2/0xb0
__blk_mq_delay_run_hw_queue+0x9d/0xb0
? blk_mq_hctx_has_pending+0x32/0x80
blk_mq_run_hw_queue+0x50/0xd0
blk_mq_sched_insert_request+0x110/0x1b0
blk_execute_rq_nowait+0x76/0x180
nvme_keep_alive_work+0x8a/0xd0 [nvme_core]
process_one_work+0x17f/0x440
worker_thread+0x126/0x3c0
? manage_workers.isra.24+0x2a0/0x2a0
kthread+0xd1/0xe0
? insert_kthread_work+0x40/0x40
ret_from_fork_nospec_begin+0x21/0x21
? insert_kthread_work+0x40/0x40
However, rmmod lpfc would run correctly.
When an nvme remoteport is unregistered with the host nvme
transport, it needs to set the remoteport->dev_loss_tmo value 0
to indicate an immediate termination of device loss and prevent
any further keep alives to that rport. The driver was never
setting dev_loss_tmo causing the nvme transport to continue to
send the keep alive.
Signed-off-by: Dick Kennedy <dick.kennedy@xxxxxxxxxxxx>
Signed-off-by: James Smart <james.smart@xxxxxxxxxxxx>
---
drivers/scsi/lpfc/lpfc_nvme.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/scsi/lpfc/lpfc_nvme.c b/drivers/scsi/lpfc/lpfc_nvme.c
index 288dd3caff8a..76a5a99605aa 100644
--- a/drivers/scsi/lpfc/lpfc_nvme.c
+++ b/drivers/scsi/lpfc/lpfc_nvme.c
@@ -2862,6 +2862,15 @@ lpfc_nvme_unregister_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
* The transport will update it.
*/
ndlp->upcall_flags |= NLP_WAIT_FOR_UNREG;
+
+ /* Don't let the host nvme transport keep sending keep-alives
+ * on this remoteport. Vport is unloading, no recovery. The
+ * return values is ignored. The upcall is a courtesy to the
+ * transport.
+ */
+ if (vport->load_flag & FC_UNLOADING)
+ (void)nvme_fc_set_remoteport_devloss(remoteport, 0);
+
ret = nvme_fc_unregister_remoteport(remoteport);
if (ret != 0) {
lpfc_nlp_put(ndlp);
--
2.13.1
