RE: [Xen-devel] [PATCH] xen-netback: correct return value checks on xenbus_scanf()

[Paul Durrant <Paul.Durrant@citrix.com>]

> -----Original Message-----
> From: Paul Durrant
> Sent: 07 July 2016 11:41
> To: Wei Liu; David Vrabel
> Cc: Jan Beulich; Wei Liu; xen-devel@lists.xenproject.org;
> netdev@vger.kernel.org
> Subject: RE: [Xen-devel] [PATCH] xen-netback: correct return value checks
> on xenbus_scanf()
> 
> > -----Original Message-----
> > From: netdev-owner@vger.kernel.org [mailto:netdev-
> > owner@vger.kernel.org] On Behalf Of Wei Liu
> > Sent: 07 July 2016 11:35
> > To: David Vrabel
> > Cc: Jan Beulich; Wei Liu; xen-devel@lists.xenproject.org;
> > netdev@vger.kernel.org
> > Subject: Re: [Xen-devel] [PATCH] xen-netback: correct return value checks
> > on xenbus_scanf()
> >
> > On Thu, Jul 07, 2016 at 10:58:16AM +0100, David Vrabel wrote:
> > > On 07/07/16 08:57, Jan Beulich wrote:
> > > > Only a positive return value indicates success.
> > >
> > > This is not correct.
> > >
> 
> If Xen's vsscanf follows the semantics of scanf(3) then 0 is a failure so I think
> the comment is correct.
> 

s/Xen/the kernel/

>   Paul
> 
> >
> > Do you mean the commit message is not correct or the code is not
> > correct? If it is the formal, do you have any suggestion to fix it?
> >
> > (I was going to just ack this because Paul already reviewed it)
> >
> > Wei.
> >
> > > David