Re: [Xen-devel] [PATCH 1/4] a fix in libxl_device_usbdev_list

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Chun Yan Liu writes ("Re: [PATCH 1/4] a fix in libxl_device_usbdev_list"):
> On 4/8/2016 at 12:45 AM, in message
> <22278.36492.245114.295391@xxxxxxxxxxxxxxxxxxxxxxxx>, Ian Jackson
> <Ian.Jackson@xxxxxxxxxxxxx> wrote: 
> > If libxl__device_usbdev_list_for_usbctrl fails, shouldn't 
> > libxl_device_usbdev_list fail too ? 
> 
> Following the similar definitions of other device types, the return value of
> this function is "libxl_device_usbdev *", to treat the above case as failure,
> it cannot be reflected through return value, we can only set return value
> to NULL, but that will be confusing with a real no-device case.

Urk.  Yes, you're right.  *sigh*

We won't fix that bad API pattern for 4.7.  So

Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>

Thanks,
Ian.

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