From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Jackson <Ian.Jackson@eu.citrix.com>
Subject: Re: [PATCH V4 3/7] libxl: add pvusb API
Date: Thu, 11 Jun 2015 17:07:17 +0100
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To: Juergen Gross <jgross@suse.com>
Cc: wei.liu2@citrix.com, ian.campbell@citrix.com, george.dunlap@eu.citrix.com, Chunyan Liu <cyliu@suse.com>, xen-devel@lists.xen.org, Simon Cao <caobosimon@gmail.com>
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Juergen Gross writes ("Re: [Xen-devel] [PATCH V4 3/7] libxl: add pvusb API"):
> The second async operation is being called with ao_how being NULL, but
> I'm not sure whether this is allowed (libxl_internal.h comments are not
> clear for me regarding such a scenario).

It is not allowed.

I'll have a look through this series.

Ian.