Re: [Xen-devel] [PATCH] switch hypercall restart indication from -EAGAIN to -ERESTART

[Aravind Gopalakrishnan <aravind.gopalakrishnan@xxxxxxx>]

On 5/12/2014 8:50 AM, Jan Beulich wrote:
> -EAGAIN being a return value we want to return to the actual caller in
> a couple of cases makes this unsuitable for restart indication, and x86
> already developed two cases where -EAGAIN could not be returned as
> intended due to this (which is being fixed here at once).
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>
>
> --- a/xen/arch/x86/hvm/svm/svm.c
> +++ b/xen/arch/x86/hvm/svm/svm.c
> @@ -1827,7 +1827,7 @@ static int svm_msr_write_intercept(unsig
>   
>           switch ( wrmsr_hypervisor_regs(msr, msr_content) )
>           {
> -        case -EAGAIN:
> +        case -ERESTART:
>               result = X86EMUL_RETRY;
>               break;
>           case 0:
Acked-by: Aravind Gopalakrishnan<Aravind.Gopalakrishnan@xxxxxxx>

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