ui: add standalone VNC server over D-Bus

[PATCH 39/60] ui: make unregister_displaychangelistener() skip unregistered

Marc-André Lureau posted 60 patches 2 weeks, 6 days ago

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Maintainers: "Marc-André Lureau" <marcandre.lureau@redhat.com>, John Snow <jsnow@redhat.com>, Peter Maydell <peter.maydell@linaro.org>, Mauro Carvalho Chehab <mchehab+huawei@kernel.org>, Pierrick Bouvier <pierrick.bouvier@linaro.org>, Jan Kiszka <jan.kiszka@web.de>, Phil Dennis-Jordan <phil@philjordan.eu>, Richard Henderson <richard.henderson@linaro.org>, Helge Deller <deller@gmx.de>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Gerd Hoffmann <kraxel@redhat.com>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, Samuel Tardieu <sam@rfc1149.net>, Igor Mitsyanko <i.mitsyanko@gmail.com>, "Hervé Poussineau" <hpoussin@reactos.org>, Aleksandar Rikalo <arikalo@gmail.com>, Laurent Vivier <laurent@vivier.eu>, Thomas Huth <th.huth+qemu@posteo.eu>, BALATON Zoltan <balaton@eik.bme.hu>, "Michael S. Tsirkin" <mst@redhat.com>, Stefano Garzarella <sgarzare@redhat.com>, "Alex Bennée" <alex.bennee@linaro.org>, Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>, Dmitry Osipenko <dmitry.osipenko@collabora.com>, Dmitry Fleytman <dmitry.fleytman@gmail.com>, Stefano Stabellini <sstabellini@kernel.org>, Anthony PERARD <anthony@xenproject.org>, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, Alistair Francis <alistair@alistair23.me>, Alex Williamson <alex@shazbot.org>, "Cédric Le Goater" <clg@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, Fabiano Rosas <farosas@suse.de>

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[PATCH 39/60] ui: make unregister_displaychangelistener() skip unregistered

Posted by Marc-André Lureau 2 weeks, 6 days ago

If the listener doesn't have associate ds / display state, it is already
unregistered.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 ui/console.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ui/console.c b/ui/console.c
index 78b0ac27827..a9132e09eac 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -677,6 +677,9 @@ void unregister_displaychangelistener(DisplayChangeListener *dcl)
 {
     DisplayState *ds = dcl->ds;
     trace_displaychangelistener_unregister(dcl, dcl->ops->dpy_name);
+    if (!ds) {
+        return;
+    }
     if (dcl->con) {
         dcl->con->dcls--;
     }

-- 
2.53.0

Re: [PATCH 39/60] ui: make unregister_displaychangelistener() skip unregistered

Posted by Daniel P. Berrangé 1 week, 6 days ago

On Tue, Mar 17, 2026 at 12:50:53PM +0400, Marc-André Lureau wrote:
> If the listener doesn't have associate ds / display state, it is already
> unregistered.
> 
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
>  ui/console.c | 3 +++
>  1 file changed, 3 insertions(+)

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>


With regards,
Daniel
-- 
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