From: "Michael Chan" <mchan@broadcom.com>
Date: Wed, 25 Jul 2007 23:39:18 -0700

David Miller wrote:

quoted

As a result there is no more messing around with fake NAPI polls and
all that other crap, instead ->poll_controller() merely has to try to
process TX queue acks to free up space and wake up the transmit
queue(s) of the device.

I think we also need to take care of link change interrupts as well.

Since netpoll is best-effort, we can elide that I think.
The more requirements you put into this ->poll_controller()
handler, the more complicated it gets.

Furthermore, this should work out.  If the link is down, the top level
poll loop will timeout waiting for the TX queue to open up, which will
kick the netpoll processing into a work queue, the link handling will
be allowed to occur meanwhile.