vhost-user-gpu: fix vugbm_device_init fallback

vugbm implements GBM device wrapping, udmabuf and memory fallback.
However, the fallback/detection logic is flawed, as if "/dev/udmabuf"
failed to be opened, it will not initialize vugbm and crash later.

Rework the vugbm_device_init() logic to initialize correctly in all
cases.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210312100108.2706195-4-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 1 insertions, 5 deletions

diff --git a/contrib/vhost-user-gpu/vhost-user-gpu.c b/contrib/vhost-user-gpu/vhost-user-gpu.c
index b27990ffdb..ef40fbccbb 100644
--- a/contrib/vhost-user-gpu/vhost-user-gpu.c
+++ b/contrib/vhost-user-gpu/vhost-user-gpu.c
@@ -1186,11 +1186,7 @@ main(int argc, char *argv[])
         exit(EXIT_FAILURE);
     }
 
-    if (g.drm_rnode_fd >= 0) {
-        if (!vugbm_device_init(&g.gdev, g.drm_rnode_fd)) {
-            g_warning("Failed to init DRM device, using fallback path");
-        }
-    }
+    vugbm_device_init(&g.gdev, g.drm_rnode_fd);
 
     if ((!!opt_socket_path + (opt_fdnum != -1)) != 1) {
         g_printerr("Please specify either --fd or --socket-path\n");