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Date: Tue, 5 Sep 2017 17:19:56 -0300
From: Eduardo Habkost <ehabkost@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 2/6] cpu: make cpu_generic_init() abort
 QEMU on error
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To: Igor Mammedov <imammedo@redhat.com>
Cc: qemu-devel@nongnu.org, Peter Maydell <peter.maydell@linaro.org>, Anthony Green <green@moxielogic.com>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, Max Filippov <jcmvbkbc@gmail.com>, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, Guan Xuetao <gxt@mprc.pku.edu.cn>, Jia Liu <proljc@gmail.com>, Magnus Damm <magnus.damm@gmail.com>, Alexander Graf <agraf@suse.de>, =?iso-8859-1?Q?Herv=E9?= Poussineau <hpoussin@reactos.org>, Richard Henderson <rth@twiddle.net>, Artyom Tarasenko <atar4qemu@gmail.com>, Andrew Jones <drjones@redhat.com>, Riku Voipio <riku.voipio@iki.fi>, Fabien Chouteau <chouteau@adacore.com>, Jan Kiszka <jan.kiszka@web.de>, Yongbok Kim <yongbok.kim@imgtec.com>, Stafford Horne <shorne@gmail.com>, David Gibson <david@gibson.dropbear.id.au>, Thomas Huth <huth@tuxfamily.org>, Bastian Koppelmann <kbastian@mail.uni-paderborn.de>, Laurent Vivier <laurent@vivier.eu>, Michael Walle <michael@walle.cc>, Aurelien Jarno <aurelien@aurel32.net>

On Mon, Sep 04, 2017 at 04:00:58PM +0200, Igor Mammedov wrote:
> Almost every user of cpu_generic_init() checks for
> returned NULL and then reports failure in a custom way
> and aborts process.
> Some users assume that call can't fail and don't check
> for failure, though they should have checked for it.
> 
> In either cases cpu_generic_init() failure is fatal,
> so instead of checking for failure and reporting
> it various ways, make cpu_generic_init() report
> errors in consistent way and terminate QEMU on failure.
> 
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> ---
> Even though it's tree wide change, it's trivial so all
> affected call sites are included within one patch.
> 
[...]
> diff --git a/qom/cpu.c b/qom/cpu.c
> index d715890..307d638 100644
> --- a/qom/cpu.c
> +++ b/qom/cpu.c
> @@ -61,7 +61,7 @@ CPUState *cpu_create(const char *typename)
>      if (err != NULL) {
>          error_report_err(err);
>          object_unref(OBJECT(cpu));
> -        return NULL;
> +        exit(EXIT_FAILURE);

Isn't it simpler to use &error_fatal?

-- 
Eduardo