[PATCH weston 4/4] rpi: prevent Weston segfaulting on shut-down due to NULL `backend`

[John Sadler]

When running with the RPi backend, Weston sefaults during shutdown. This is
due to the fact that `compositor->backend` is never initialised, and there
is no NULL check prior to calling `destroy()`.

This commit fixes the issue by making `rpi_backend_create()` intialise
`compositor->backend` - just like the X11 backend does.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91886

Signed-off-by: John Sadler <deathofathousandpapercuts at gmail.com>
---
 src/compositor-rpi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/compositor-rpi.c b/src/compositor-rpi.c
index 340a974..3d2e09f 100644
--- a/src/compositor-rpi.c
+++ b/src/compositor-rpi.c
@@ -533,6 +533,8 @@ rpi_backend_create(struct weston_compositor *compositor,
 		goto out_launcher;
 	}
 
+	compositor->backend = &backend->base;
+
 	return backend;
 
 out_launcher:
-- 
1.8.1.4