Reconnect on RDMA device reset

[Sagi Grimberg]

> So to summarize your view on this topic:
> * Agreed that user experience should be such that after an RDMA device reset
>    everything should continue as before without admin intervention.

Yes

> * Both for host and target stacks.

Yes

> * This should not be handled by the driver itself.
> * A userspace daemon that listens on udev events should retry the reconnects
>    or re-binds using configfs.

No, I'm saying transient errors should be handled by the driver itself,
recovery from permanent errors (like unplug+replug) should be handled
outside the kernel.