From: Wei Liu <wei.liu2@citrix.com>
Date: Mon, 25 Aug 2014 15:44:00 +0000 (+0100)
Subject: xen-netback: move netif_napi_add before binding interrupt
X-Git-Tag: fixes-for-v3.18-merge-window~162^2~43
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e24f8191cc35ae3780b4656a6befae8b8657edc2;p=pandora-kernel.git

xen-netback: move netif_napi_add before binding interrupt

Interrupt is enabled when bind_interdomain_evtchn_to_irqhandler returns.
If there's interrupt pending interrupt handler is invoked.

NAPI needs to be initialised before binding interrupt otherwise the
interrupt handler will try to scheduling a NAPI instance that is not
initialised yet, resulting in kernel OOPS.

This fixes a regression introduced in ea2c5e13 ("xen-netback: move NAPI
add/remove calls").

Ideally function calls to create kthreads should also be moved before
binding but I intent to fix this regression with minimal changes and
refactor the code with another patch.

Reported-by: Thomas Leonard <talex5@gmail.com>
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

Reading git-diff-tree failed