Re: [Qemu-devel] [PATCH 07/11] pseries: Cleanup error handling in spapr_kvm_type()

[Thomas Huth <thuth@redhat.com>]

On 11/12/15 01:11, David Gibson wrote:
> Use error_setg() and &error_fatal instead of an explicit exit().
> 
> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
> ---
>  hw/ppc/spapr.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index fd16db4..546d2f5 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -2035,8 +2035,8 @@ static int spapr_kvm_type(const char *vm_type)
>          return 2;
>      }
>  
> -    error_report("Unknown kvm-type specified '%s'", vm_type);
> -    exit(1);
> +    error_setg(&error_fatal, "Unknown kvm-type specified '%s'", vm_type);
> +    return 0;
>  }

Honestly, I'd rather prefer the original code here. error_setg() should
IMHO be used to set an error in an "flexible" error variable. Using it
with an "hard-coded" error_fatal sounds ugly to me. And as far as I can
see, no other code in QEMU uses error_setg(&error_fatal, ...) - so we
should maybe not start with this in the spapr code as well.

If you still would like to get rid of the exit() here ... maybe you
could introduce some kind of error_report_fatal() function instead that
exits after reporting the error with error_report() ?

 Thomas