[PATCH WIP/RFC v2 6/6] nvme-rdma: use ib_client API to detect device removal

[Steve Wise]

> 
> >> Will this code work?
> >>
> >> 	mutex_lock(&nvme_rdma_ctrl_mutex);
> >> 	list_for_each_entry(ctrl, &nvme_rdma_ctrl_list, list) {
> >> 		if (ctrl->device->dev != ib_device)
> >> 			continue;
> >>
> >> 		__nvme_rdma_del_ctrl(ctrl);
> >> 	}
> >> 	mutex_unlock(&nvme_rdma_ctrl_mutex);
> >>
> >> 	flush_workqueue(nvme_rdma_wq);
> >
> > I'll try this.  It is cleaner/easier to understand.
> >
> > I'm also moving the controller list to per-device as Christoph recommends.
> 
> I'm still not sure if it's a real must. This will only save us the
> condition (as we'll get the device in the client data)

True, and your logic avoids the unlock/relock.