From b4dfd326c29c241c2bb8463167217eb2438b7c3d Mon Sep 17 00:00:00 2001
From: Alistair Popple <alistair@popple.id.au>
Date: Wed, 30 Oct 2013 10:50:37 +1100
Subject: [PATCH] ibm emac: Don't call napi_complete if napi_reschedule failed

This patch fixes a bug which would trigger the BUG_ON() at
net/core/dev.c:4156. It was found that this was due to continuing
processing in the current poll call even when the call to
napi_reschedule failed, indicating the device was already on the
polling list. This resulted in an extra call to napi_complete which
triggered the BUG_ON().

This patch ensures that we only contine processing rotting packets in
the current mal_poll call if we are not already on the polling list.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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