From: David Woodhouse <dwmw2@infradead.org>
Date: Wed, 07 Nov 2012 12:52:14 +0000

> Now that we can return zero from pppoatm_send() for reasons *other* than
> the queue being full, that means we can't depend on a subsequent call to
> pppoatm_pop() waking the queue, and we might leave it stalled
> indefinitely.
> 
> Fix this by immediately scheduling the wakeup tasklet. As documented
> already elsewhere, the PPP channel's ->downl lock protects against the
> wakeup happening too soon and effectively being missed.
> 
> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
> ----
> Untested.
> With this sorted, Acked-By: David Woodhouse <David.Woodhouse@intel.com<
> to the other seven. Thanks.

I don't know what to do with this patch because I don't have any
context whatsoever.

So I'm tossing it, please resubmit it when it's meant to be
applied, and with some context.