[PATCH v2 02/33] ibmvfc: flush rport_add_work_q during driver teardown

[Tyrel Datwyler <tyreld@linux.ibm.com>]

INIT_WORK is called on rport_add_work_q during driver probe. When the
adapter is removed, ibmvfc_remove() stops the work thread and proceeds
to tear down the FC host, but any work item queued via schedule_work()
that raced the teardown could still be running or pending in the
system workqueue.

Add a flush_work() call after kthread_stop() and before fc_remove_host()
to drain any outstanding rport add work before the FC host and its rports
are torn down.

Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
---
 drivers/scsi/ibmvscsi/ibmvfc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 0a5f73df8d7d..72317d7840a5 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -6443,6 +6443,7 @@ static void ibmvfc_remove(struct vio_dev *vdev)
 
 	ibmvfc_wait_while_resetting(vhost);
 	kthread_stop(vhost->work_thread);
+	flush_work(&vhost->rport_add_work_q);
 	fc_remove_host(vhost->host);
 	scsi_remove_host(vhost->host);
 
-- 
2.55.0