From 16f1cf3ba7303228372d3756677bf7d10e79cf9f Mon Sep 17 00:00:00 2001
From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Date: Wed, 29 Apr 2015 17:10:13 -0400
Subject: [PATCH] xen/xenbus: Update xenbus event channel on resume

After a resume the hypervisor/tools may change xenbus event
channel number. We should re-query it.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
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