Re: [Xen-devel] [PATCH v2] x86/domctl: Improve XEN_DOMCTL_hypercall_init error handling

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Thu, Mar 12, 2015 at 11:03:22AM +0000, Andrew Cooper wrote:
> EACCES cannot be distinguished against an incorrect DOMCTL_INTERFACE_VERSION,
> and will cause an incorrect "need to rebuild the user-space tool set?" message
> from libxc.
> 
> On the libxc side, put the useful piece of information in the error message,
> rathe than the -1 from do_domctl().
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> CC: Jan Beulich <JBeulich@xxxxxxxx>
> CC: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
> CC: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
> CC: Wei Liu <wei.liu2@xxxxxxxxxx>
> 

Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

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