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Mon, 25 Apr 2022 09:08:17 -0400 X-MC-Unique: zueK9MNOPgepF1xxCdoEoA-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0688C3C02B84; Mon, 25 Apr 2022 13:08:17 +0000 (UTC) Received: from redhat.com (unknown [10.33.36.152]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 29CBE401E97; Mon, 25 Apr 2022 13:08:11 +0000 (UTC) Date: Mon, 25 Apr 2022 14:08:08 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Martin Kletzander Subject: Re: [PATCH 18/18] audio/spiceaudio: Fail initialisation when not using spice Message-ID: References: <5db1fdef0330f20ed6ae306b5a71dad1b5e9b44c.1650874791.git.mkletzan@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <5db1fdef0330f20ed6ae306b5a71dad1b5e9b44c.1650874791.git.mkletzan@redhat.com> User-Agent: Mutt/2.1.5 (2021-12-30) X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 Received-SPF: pass client-ip=170.10.133.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Cc: Peter Maydell , Pavel Dovgalyuk , libvir-list@redhat.com, Christian Schoenebeck , qemu-devel@nongnu.org, Yanan Wang , Gerd Hoffmann , Qiuhao Li , =?utf-8?B?SGVydsOp?= Poussineau , Marcel Apfelbaum , =?utf-8?Q?Marc-Andr=C3=A9?= Lureau , Laurent Vivier , Thomas Huth , Alistair Francis , Alexander Bulekov , Bandan Das , qemu-arm@nongnu.org, Jan Kiszka , Stefan Hajnoczi , Eduardo Habkost , Darren Kenny , Thomas Huth , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , qemu-ppc@nongnu.org, Paolo Bonzini Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: "Qemu-arm" X-TUID: WDqRoKp8xRsz On Mon, Apr 25, 2022 at 10:22:01AM +0200, Martin Kletzander wrote: > The caller would already fail, but this way the message can better > express the reason for the failure. > > Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2043498 > > Signed-off-by: Martin Kletzander > --- > audio/spiceaudio.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/audio/spiceaudio.c b/audio/spiceaudio.c > index a8d370fe6f31..fdbd7dc285ad 100644 > --- a/audio/spiceaudio.c > +++ b/audio/spiceaudio.c > @@ -74,8 +74,9 @@ static const SpiceRecordInterface record_sif = { > static void *spice_audio_init(Audiodev *dev) > { > if (!using_spice) { > - return NULL; > + error_setg(&error_fatal, "Cannot use spice audio without -spice"); Typically one would not use error_fatal directly with a call to error_setg(). The usual pattern would be for the method calling error_setg() to have an 'Error **errp' parameter. The caller would then pass in &error_fatal when calling the method, or pass in a real error object if wishing to receive the error. If you don't want to plumb in an 'Error **errp' to the spice_audio_init() method, then it would be sufficient to instead just do error_report("Cannot use spice....") Using 'Error **errp' is best practice in new code, but no one will blame you for not refactoring existing code to support this if looks like too much work. With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|