Re: [Xen-devel] [PATCH for-4.6] libxl: fix libxl__build_hvm error code return path

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Tue, 2015-08-11 at 09:57 +0100, Wei Liu wrote:
> On Fri, Aug 07, 2015 at 06:08:25PM +0200, Roger Pau Monne wrote:
> > This is a simple fix to make sure libxl__build_hvm returns an error 
> > code in
> > case of failure.
> > 
> 
> 
> 
> > Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
> > Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> > Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> > Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
> > Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
> 
> Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

Unfortunately I think this will result in any valid rc's any path happens
to have being discarded in favour of a generic ERROR_FAIL.

If we are going to band aid this for 4.6 then I think setting rc =
ERROR_FAIL just after the libxl__domain_device_construct_rdm error handling
might be better.

Even better would be to put the rc = ERROR_FAIL into the various if (ret)
blocks. I don't think that would be an unacceptably large patch (it's 3-4
sites from what I can see) and it would be closer to heading in the right
direction.

Ian.


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